JP5026375B2 - Storage device and storage device control method - Google Patents

Description

  The present invention relates to resource utilization of a storage system.

  For example, in a database system that handles large-scale data such as a data center, the data is managed using a storage system that is configured separately from the host computer. This storage system is composed of, for example, a storage device. In response to an input / output request from the host computer, the storage apparatus can provide a logical volume (logical unit) formed on a storage area of a plurality of storage devices to the host (host computer).

  Patent Document 1 describes a method of dividing a storage device so that it can be managed as a plurality of logical storages.

U.S. Patent No. 7,069,408

When a storage device is divided and used as multiple virtual storage devices, if the number of virtual storage devices increases, virtual storage devices that are not always used, such as temporary project and virtual storage devices for testing, are mixed I will do it. In such a situation, in the technique described in Patent Document 1,
There is a problem that control information and volume data of a virtual storage device that is not always used consumes the capacity of the storage device and is wasted.

  When the virtual storage apparatus is suspended, the control information and volume data are saved in an external storage apparatus or the like, and the used storage apparatus resources are released as free resources. When the virtual storage device is resumed, free resources of the storage device are secured, and the control information and volume data stored in the external storage device are recovered.

  According to the present invention, the following effects can be expected.

  Volumes can be released by storing control information and data for virtual storage devices that will not be used for a while in an inexpensive external tape storage or the like. Therefore, the capacity of the storage device can be diverted to another virtual storage device, and the efficiency of resource utilization can be improved.

Hereinafter, an embodiment of the present invention will be described.
(First embodiment)
FIG. 1 shows a physical configuration of a virtual storage system according to an embodiment of the present invention.

  The group 101 includes a management server 102 and one or a plurality of hosts 103. The group 101 corresponds to a host group in a SAN (Storage Area Network).

  Host 103 includes port 104. The port 104 is implemented by an interface such as FC (Fiber Channel) or SATA (Serial Advanced Technology Attachment). The host 103 communicates with the port 108 of the virtual storage apparatus 106 from the port 104 via the network 119. A read / write command (I / O request) issued by the host 103 is transmitted to the physical storage device 120 via the port 104, the network 119, and the port 108. The physical storage device 120 transmits the result data and the like to the host 103 via the port 122, the network 119, and the port 104.

  The host 103 has a memory 1003 and an HDD (Hard Disk Drive) 1004 that are components for storing information, and has a processor 1002 that executes a program stored in the memory 1003 and the HDD 1004 based on data stored in the memory 1003 and the HDD 1004. And an I / F 1005 such as a LAN (Local Area Network) and iSCSI (Internet Small Computer System Interface) for communicating with other computers and storage devices.

  The management server 102 is also a device having a hardware configuration equivalent to that of the host 103 described above.

  The management server 102 communicates with the management I / F 121 of the physical storage apparatus 120 via the network 105 from the I / F 1005. The management I / F 121 and the network 105 are implemented by a LAN or the like. The management server 102 transmits a program operation instruction or the like to the physical storage device 120 via the network 105. The program represents a storage device function (such as a remote copy function or a local copy function). The management server 102 may exist for each group 101.

  The physical storage device 120 has a management I / F 121. The management I / F 121 is implemented as an I / F such as a LAN, for example.

  The physical storage device 120 has one or more ports 122. The port 122 is implemented by an interface such as FC.

  The physical storage device 120 has a control unit 123. The control unit 123 has a control processor 124 and a control memory 125. The control processor 124 refers to various programs and data stored in the control memory 125 and executes various processes. For example, the control processor 124 executes a read / write command received from the host 103, processing for obtaining a correspondence relationship between the virtual storage device 106 and the physical storage device 120, which will be described later, and the like.

  The physical storage device 120 has a physical drive 127. The physical drive 127 is implemented by a non-volatile storage device such as an HDD or SSD (Solid State Drive) that generally does not lose data even when the power is turned off. The physical storage device 120 has a cache memory 126. The cache memory 126 is generally implemented by a RAM (Random Access Memory) that can be accessed at a higher speed than the physical drive 127. The cache memory 126 has a plurality of memory slots 130. By temporarily storing the data stored in the physical drive 127 by the program executed by the control processor 124 in the cache memory 126, there is an effect of speeding up the transmission of data to the host 103.

  The physical storage device 120 has an external connection port 128. The physical storage device 120 communicates with the external storage device via the external connection port 128. The external connection port 128 is implemented by an interface such as FC. However, the port 122 has a SCSI target function, whereas the external connection port 128 has a SCSI initiator function. Depending on the function of the initiator, the physical storage device 120 can communicate with the external storage device 129, and the storage area of the external storage device 129, that is, the external volume, can be used instead of the storage area, that is, the physical drive 127 provided in the physical storage device 120. .

  In the configuration described above, the management server 102 may communicate with the physical storage device 120 via the network 119 and transmit an operation instruction or the like. Specifically, the physical storage apparatus 120 prepares a dedicated volume for management (referred to as a command device) and communicates by accessing from the management server 102.

  In the virtual storage system of the present specification, functional components constituting the virtual storage apparatus 106 are defined in three layers. The three hierarchies are a physical layer, a resource pool, and a virtual layer.

  The physical layer is a hierarchy indicating a physical device such as a physical drive. In this specification, the term “physical resource” refers to devices in general belonging to this physical layer.

  A resource pool is a set of resource volumes. The resource volume is allocated to the virtual storage device 106 and used. In this specification, the term “resource” refers to a general logical device belonging to this resource pool. Resources are numbered within the range of the physical storage device 120, and this number is called a resource number.

  The virtual layer is a hierarchy indicating resources allocated to the virtual storage apparatus 106. In this specification, the term “virtual resource” refers to devices in general belonging to this virtual layer. In the virtual layer, a number is assigned in the range of the virtual storage device 106, and this number is called a virtual resource number.

  For details, FIG. 3 shows the relationship between the physical layer and the resource pool hierarchy and the relationship between the resource pool and the virtual layer in the volume, cache memory, and control unit.

  FIG. 2 shows a correspondence relationship between the physical configuration of the virtual storage system and the virtual storage device 106 according to the first embodiment of the present invention.

  In the virtual storage system of the present invention, one physical storage device can be used as a plurality of virtual storage devices 106. Therefore, the virtual storage device 106 can be used for each group 101. The management server 102 can manage each group 101. The method of providing one physical storage device as a plurality of virtual storage devices 106 will be described in detail later with reference to FIG. In general, a plurality of groups 101 exist in a virtual storage system.

  The virtual storage apparatus 106 has a management I / F 107. The management server 102 communicates with the management I / F 107 of the virtual storage device 106 via the network 105. The entity of the management I / F 107 is the management I / F 121 of the physical storage device 120. The management I / Fs 107A and 107B physically correspond to one management I / F 121. In FIG. 2, the management servers 102A and 102B access the management I / Fs 107A and 107B, respectively. In this case, the management I / F 121 distinguishes between the management servers 102A and 102B by the port number of the same IP address of Ethernet (registered trademark). Alternatively, the management servers 102A and 102B may be distinguished by implementing a method of having a plurality of IP addresses with one management I / F in the management I / F 121.

  Since the management server 102 exists for each group 101, an administrator for each group 101 can manage the virtual storage apparatus 106 by each.

  The virtual storage device 106 has a port 108. The port 122 of the physical storage device 120 corresponds to the port 108 in the virtual storage device 106. The port 122 is mounted in a one-to-one correspondence with the port 108.

  The virtual storage device 106 has a virtual control unit 109. The virtual control unit 109 executes a read / writereadre instruction received by the port 108 from the host. The control unit 123 of the physical storage device 120 corresponds to the virtual control unit 109 in the virtual storage device 106. The physical storage device 120 allocates the computing resources of the control processor 124 of the control unit 123 to the virtual control unit 109. Details of the allocation method and the like will be described later with reference to FIG.

  The virtual storage device 106 has a virtual volume 111. The virtual volume 111 is a storage area for storing data received from the host 103. Details of the correspondence between the virtual volume 111 and the volume of the physical storage device 120 will be described later with reference to FIG.

  The virtual storage device 106 has a virtual cache memory 110. The virtual cache memory 110 temporarily stores data stored in the virtual volume 111. In general, the virtual cache memory 110 is a storage area that can be accessed at a higher speed than the virtual volume 111. The cache memory 126 of the physical storage device 120 corresponds to the virtual cache memory 110. In the virtual storage system, a part of the storage area of the cache memory 126 is allocated as the virtual cache memory 110 for each virtual storage 101. Details of the allocation method and the like will be described later with reference to FIG.

  FIG. 3 shows the relationship between the physical layer and the resource pool hierarchy in the volume, cache memory, and control unit, and the relationship between each resource and the virtual storage device 106.

  First, the relationship between physical resources and resources will be described.

  A RAID technology that uses a plurality of physical drives 127 and makes one virtual volume is generally known. A RAID volume is used to create a resource volume 1202 using a plurality of physical drives 127. For example, the control unit of the physical storage device 120 creates a parity group 1203A using four physical drives 127A to 127D, and allocates a part of the parity group as a resource volume 1202A.

  A set of resource volumes 1202 existing in the physical storage device 120 is a resource volume pool 2701.

  A table showing the correspondence between the resource volume 1202 and the parity group is resource volume control information 3201 described later with reference to FIG.

  The physical storage device 120 has a plurality of memory slots 130. A plurality of memory slots 130 are assigned as resource cache memory 1302 to a uniform storage area address space.

  The resource cache memory 1302 is identified at the time of allocation to the virtual storage device by the resource cache memory address. For example, the resource cache memory address is defined by a calculation formula “(memory slot number × memory slot storage capacity) + address on memory slot”. The memory slot number is a number starting from 0 that is associated with each memory slot 130 installed in the physical storage device 120. For example, if the memory capacity of the memory slot is 256 MB and the address on the memory slot of memory slot 3 is “0x1000000”, the resource cache memory address is “0x31000000”.

  A set of resource cache memories 1302 existing in the physical storage device 120 is a resource cache memory pool 302.

  A table showing the correspondence between resource cache memory addresses and memory slots is resource cache memory control information 902 described later with reference to FIG.

  On the control processor, there is a task 304 that is a subject that executes a program such as I / O processing. The task 304 is equivalent to a thread or process in a general OS. The control processor 124 activates a certain number of tasks in advance. Each task corresponds to a resource task.

  A set of resource tasks 305 existing in the physical storage device 120 is a resource task pool 303.

  A table showing the correspondence between resource task numbers and task numbers is resource task control information 903 described later with reference to FIG.

  Next, the relationship between resources and the virtual storage device 106 will be described.

  The virtual volume 111 is a virtual resource in which the resource volume 1202 is assigned to the virtual storage device 1201. The virtual volume number is uniquely assigned to each virtual storage device. For example, the virtual volume number of the virtual volume 1202A of the virtual storage 1201A may be 1, and the virtual volume number of the virtual volume 1202B of the virtual storage 1201B may be 1.

  A table showing the correspondence between resource volumes and virtual volumes is virtual storage resource management information 821. These tables are used for processing an I / O request from the host (I / O processing). Details of the I / O processing will be described later with reference to FIG.

  The virtual cache memory is a virtual resource in which the resource cache memory 1302 is allocated to the virtual storage device 1201. The virtual cache memory address is uniquely assigned to each virtual storage device. For example, the virtual cache memory address is represented by a continuous storage area space starting from 0. A table showing the correspondence between the virtual cache memory address and the resource cache memory address is the virtual storage resource management information 411.

  The I / O processing from the host refers to the virtual storage resource management information 411 and the physical storage control information 410 to obtain the resource cache memory address from the virtual cache memory address.

  The virtual control unit is a virtual resource in which the resource task 305 from the resource task pool 303 is assigned to the virtual storage device 1201. A plurality of tasks may be assigned to a plurality of virtual control units based on required I / O processing performance or the like.

  In this embodiment, a certain number of tasks are activated, and a plurality of tasks are assigned to the virtual storage apparatus 106 according to the required performance from the resource task pool. However, in a general OS, priority can be specified for a task. For this reason, as a method for providing a resource task pool, there is a method in which one task is assigned to one virtual storage device 106 and the priority of the task is set according to the required performance.

  FIG. 4 shows programs and data structures in the control memory 125 executed by the control processor 124 in the control unit 123 of the physical storage device 120.

  In the control memory 125, zero or more virtual storage control information 401 is stored. The virtual storage control information 401 includes information for controlling individual virtual storage apparatuses 106 mounted on the physical storage. The virtual storage control information 401 includes program control information 402, LUN security information 403, LUN mapping information 404, and virtual storage configuration information 405. Details of each information will be described with reference to FIGS. The virtual storage control information 401 exists as many as the number of virtual storage devices 106 on the physical storage device.

  In the control memory 125, physical storage control information 410 is stored. The physical storage control information 410 is a set of tables representing the correspondence relationship between resources and physical resources. Details will be described with reference to FIGS.

  In the control memory 125, virtual storage resource management information 411 is stored. The virtual storage resource management information 411 is a table representing the correspondence between resources and the virtual storage device 106. Details will be described with reference to FIG.

  In the control memory 125, WWN change notification information 412 is stored. The WWN change notification information 412 stores information related to the WWN (World Wide Name) of the port when the configuration of the port on the host side is changed. The WWN is an identifier of a port that is uniquely assigned when a normal port is manufactured. Details of the host-side change notification will be described with reference to FIG.

  A program called a suspend process 421 is stored in the control memory 125. The suspend process 421 is a process for releasing the resources by suspending the target virtual storage apparatus 106, and is a process that is activated by an instruction from the management server 102 or the like. Suspending the virtual storage device 106 means performing a process such as turning off the power of a component related to the target virtual storage device 106 and preparing for it. Details will be described later with reference to FIG. 27 using a flowchart.

  In the control memory 125, a program called resume processing 422 is stored. The resume process 422 is a process for executing processing such as turning on the power of related resources and processing for preparation when the target virtual storage apparatus 106 is suspended. The resume process 422 is a process for allocating resources to the virtual storage apparatus 106. Details will be described later with reference to FIG. 29 using a flowchart.

  In the control memory 125, a program called host command processing 423 is stored. The host processor 423 is executed by the control processor 124. The host command processing 423 is processing for transferring corresponding data from the physical disk 127 or the cache memory 126 to the port when the port 122 receives a read / write command from the host. Specifically, the physical storage device 120 executes transfer by a DMA (Direct Memory Access) circuit included in the control unit 123. Details will be described later with reference to FIG. 28 using a flowchart.

  In the control memory 125, a program called a WWN change notification reception process 424 is stored. The WWN change notification reception process 424 is a program that executes a process of receiving port WWN information and the like from the host when the host-side port configuration is changed. Details will be described later with reference to FIG.

Next, each information included in the virtual storage control information 401 will be described. (Figs. 5-8)
FIG. 5 shows the data structure of the LUN security information 403.

  The LUN security information 403 is a set of a set of LUN 511 and accessible WWN 512. The LUN security is a means for preventing access to the LUN of its own host group from a port of another host group in a SAN environment or the like.

  For example, in FIG. 5, in order for a host to access a volume whose LUN 511 is “3”, the WWN of the host port must be “WWN1”, “WWN2”, or “WWN3”.

  FIG. 6 shows the data structure of the LUN mapping information 404.

  The LUN mapping information 404 is information indicating the correspondence between the LUN 611 of the volume accessed from the host and the virtual volume. The LUN mapping information 404 is a set of a set of LUN 611, virtual storage volume number 612, and LUSE (Logical Unit Size Expansion) information 613.

  For example, in FIG. 6, when a host accesses a volume whose LUN 611 is “3”, the host accesses virtual volumes whose virtual volume numbers 612 are “1”, “2”, “3”, “4”. Will do. Here, there are a plurality of virtual volumes accessed by the host because the LUSE information 613 is “present”. LUSE is a function that shows a plurality of volumes to a host as one large volume. When the host accesses a volume whose LUN 611 is “3”, the host capacity appears to be the total size of the volumes whose volume capacities are “1”, “2”, “3”, and “4”.

  FIG. 7 shows the data structure of the program control information 402.

  The program control information 402 shows an example of information for controlling a program used in the physical storage device 120. In FIG. 7, the program control information 402 represents a pair status table in a general volume copy function.

  The program control information 402 includes a P-VOL number 711, an S-VOL number 712, a pair status 713, and a program type 714 as elements. The P-VOL number 611 is a number representing a copy source volume. This P-VOL number 711 is a LUN. The S-VOL number 712 is a number representing a copy destination volume. This S-VOL 712 number is a LUN. The pair status 713 represents the status of the paired volume. The “copying” in the pair status 713 indicates that data is being copied from the copy source volume to the copy destination volume. A program type 714 represents a program type such as “remote copy” or “local copy”. In addition, other control information related to programs such as the local copy function and the remote copy function may be stored in the control memory 125 as the program control information 202.

  FIG. 8 shows the data structure of the virtual storage configuration information 405.

  The virtual storage configuration information 801 and 802 holds specifications such as the size of resources held by the virtual storage apparatus 106. For example, the virtual storage configuration information 801 indicates the correspondence between the virtual volume number 811 in the virtual storage apparatus 106 and its size 812. The virtual storage configuration information 802 indicates the number of ports 831, the cache size 832, and the number of tasks 833 that the virtual storage apparatus 106 has.

  The virtual storage configuration information 801 and 802 are referred to when the virtual storage apparatus 106 is resumed, and are used when determining resources necessary for the resume.

Next, the physical storage control information 410 will be described. (Figs. 9-14)
FIG. 9 shows the internal structure of the physical storage control information 410.

  The physical storage control information 410 holds the correspondence between resources and the physical storage device 120, the power supply status, and the like.

  The physical storage control information 410 includes resource volume control information 901, resource cache memory control information 902, resource task control information 903, parity group control information 904, and physical disk control information 905. The contents of each information will be described with reference to FIGS.

  FIG. 10 shows the data structure of the resource volume control information 901.

  The resource volume control information 901 includes a usage state 1024, a size 1025, a parity group number 1026, a start position 1027, and external connection information 1028 for each resource volume with the resource volume number 1021.

  The resource volume number 1021 is a unique number in the physical storage device.

  The usage state 1024 is information indicating whether or not the resource volume 1202 is allocated to the virtual storage apparatus 106. The usage state 1024 is “in use” if the resource volume 1202 has been allocated to the virtual storage apparatus 106, and “unused” if the resource volume 1202 has not been allocated.

  The size 1025 represents the size of the resource volume. For example, in FIG. 10, the size of the resource volume with the resource volume number 1 is “300 GB”.

  The parity group number 1026 represents the number of the parity group to which the resource volume belongs.

  The start position 1027 indicates from which position of the parity group number 1026 the resource volume is allocated. The start position 1027 is represented by an offset from the start address of the parity group.

  The external connection information 1028 is used when the physical storage device 120 allocates an external volume of the external storage device 1210 to the resource volume 1202. Further, the external connection information 1028 stores an identifier that is assigned to the resource volume 1202 and uniquely identifies the external volume when the physical storage device 120 communicates with the external storage device 129 via the port 128. When the physical storage device 120 allocates the resource volume 1202 on the parity group 1203, the resource volume 1202 does not correspond to the external volume. At this time, the physical storage device 120 stores NULL as an invalid value in the external connection information 1028.

  FIG. 11 shows the data structure of the parity group control information 904.

  The parity group control information 904 includes a parity group number 1111, a physical disk number list 1112, and a RAID level 1113 for each parity group held in the physical storage device.

  The parity group number 1111 is an identifier representing a parity group held by the physical storage device.

  The physical disk number list 1112 is a list of physical disk numbers representing physical disks used by the parity group.

  The RAID level 1113 represents the RAID level of the parity group. For example, in FIG. 11, the parity group with the parity group number “1” uses four physical disks with physical disk numbers “1”, “2”, “3”, and “4”, and the RAID level is “ RAID 5 ″.

  FIG. 12 shows the data structure of the physical disk control information 905.

  The physical disk control information 905 includes a physical disk number 1211, a power state 1212, and a power counter 1213 for each physical disk held by the physical storage device.

  The physical disk number 1211 is an identifier representing a physical disk held by the physical storage device.

  The power state 1212 represents the power state of the physical disk. The control processor 124 inputs “ON” to the power supply state 1212 if the power supply of the physical disk is ON, and “OFF” if the power supply is OFF.

  The power supply counter 1213 represents the number of virtual storage devices 106 assigned when physical disks are assigned to the virtual storage devices 106.

  However, when the physical storage device 120 manages the power supply in units of parity groups, the power supply state 1212 and the power supply counter 1213 included in the physical disk control information 905 may be included in the parity group control information 904.

  FIG. 13 shows the data structure of the resource cache memory control information 902.

  The resource cache memory control information 902 holds a resource cache memory address 1341, a power state 1342, a use state 1344, and a memory slot number 1345 for each resource cache memory 1302 held in the physical storage device.

  A resource cache memory address 1341 represents a range of resource cache memory addresses for each resource cache memory 1302. The resource cache memory address 1341 is a unique address in the physical storage device.

  A power state 1342 represents a power state of the resource cache memory 1302. If the power of the resource cache memory 1302 is ON, the control processor 124 inputs “ON”, and if the power is OFF, the control processor 124 inputs “OFF”.

  The usage state 1344 is information indicating whether or not the resource cache memory 1302 is allocated to the virtual storage device 106. If the resource cache memory 1302 has already been allocated to the virtual storage apparatus 106, the control processor 124 inputs “in use”, and if it has not been allocated, the control processor 124 inputs “unused”.

  The memory slot number 1345 is a slot number representing a memory slot corresponding to the resource cache memory 1302.

  FIG. 14 is a diagram showing the data structure of the resource task control information 903.

  The resource task control information 903 holds a resource task number 1461, a power state 1462, a usage state 1464, a control processor number 1465, and a task number 1466 for each resource task 305 held in the physical storage device.

  The resource task number 1461 is an identifier representing the resource task 2705 held by the physical storage device. The resource task number 1461 is a number unique within the physical storage device.

  A power state 1462 represents the power state of the resource task 305. If the power of the resource task 305 is ON, the control processor 124 inputs “ON”, and if the power is OFF, the control processor 124 inputs “OFF”. A power state exists for each control processor 124.

  The use state 1464 is information indicating whether the resource task 305 is assigned to the virtual storage apparatus 106. If the resource task 305 has been assigned to the virtual storage apparatus 106, the control processor 124 inputs “in use”, and if it has not been assigned, the control processor 124 inputs “unused”.

  The control processor number 1465 represents a control processor number that is an identifier of the control processor on which the resource task 305 operates.

  The task number 1466 is a task number corresponding to the resource task. The task number 1466 is a unique number for each control processor 124. However, when the OS that operates on each control processor 124 in the physical storage device 120 is a general SMP type OS that operates in parallel between a plurality of control processors 124, the task number 1466 is unique among the plurality of processors. In some cases.

  FIG. 15 shows the data structure of the virtual storage resource management information 411.

  The virtual storage resource management information 1501, 1521, 1541, 1561 holds a correspondence relationship between resources and the virtual storage apparatus 106. For example, the virtual storage resource management information 1501 holds the correspondence between the virtual storage device number 1511 and the cache area 1512. Further, the virtual storage resource management information 1521 holds a correspondence relationship between the virtual storage device number 1531, the virtual volume number 1532, and the resource volume number 1533. Further, the virtual storage resource management information 1541 holds a correspondence relationship to which virtual storage device number 1551 the port number 1552 belongs. Also, the virtual storage resource management information 1561 indicates which task number the virtual storage device 106 of the virtual storage device number 1571 holds.

  FIG. 16 shows storage image data 1601 that is a data structure for storing the entire state of the virtual storage apparatus 106 as data.

  The storage image data 1601 is stored in the external storage device 129 or the like when the virtual storage device 106 is suspended. The storage image data 1601 is created for each virtual storage device 106.

  The storage image data 1601 includes virtual storage control information 401 and volume data 1603. The virtual storage control information 401 is control information corresponding to the suspended virtual storage apparatus 106. The volume data 1603 is data stored for each virtual volume 111 existing in the suspended virtual storage apparatus 106.

  FIG. 17 shows programs and data structures in the memory 1003 executed by the processor 1002 of the host 103 and the management server 102.

  The memory 1003 of the host 103 and the management server 102 includes an OS (Operation System) 1703, a storage management program 1704, a WWN change notification program 1705, key information 1701, and WWN information 1702.

  The storage management program 1704 is a program for managing the virtual storage device 106. The storage management program 1704 is a program for the administrator of the virtual storage apparatus 106 to execute a volume copy function pair operation or the like.

  The OS 1703 controls the port 104 to recognize a virtual volume 111 of the virtual storage apparatus 106 described later and sets it as the volume 1109. The OS 1703 provides the volume 1109 as a storage area used by the application 1706.

  An application 1706 is a program for accessing the volume 1109. The application 1706 may be database software, for example.

  The key information 1701 and WWN information 1702 are used when the management server 102 changes the WWN of the physical storage device 120.

  FIG. 18 is a diagram showing a data structure of the WWN information 1702.

  The management server 102 holds the WWN information 1702 in the memory 1003, refers to the WWN information 1702 when the virtual storage apparatus 106 is resumed, starts the WWN change notification program 1705, and notifies the physical storage apparatus 120 of the WWN change. .

  The WWN information 1702 includes a host group number 1811, a host number 1812, a host port number 1813, a host WWN 1814, and a change presence / absence 1815.

  The host group number 1811 is a number for the virtual storage system to identify the host group 101. The host number 1812 is a number for identifying the host 103 in the host group 101. The host port number 1813 is a number for identifying the port 104 built in the host 103. The host WWN 1814 represents the WWN of the port 104 of the host 103. In the change presence / absence 1815, the management server 102 inputs “Yes” when the WWN of the port 104 of the host 103 is changed, and inputs “None” when it is not changed.

  FIG. 19 is a diagram showing the operation of changing the configuration on the host side.

  In the group including the old host 1902A and the management server 102, it is assumed that the virtual storage system is not used for a while and the entire system is temporarily stopped. In that case, in order to stop the operation of the host, the administrator executes suspend or power-off by the OS. Since the virtual storage apparatus 106 is also suspended, the administrator issues a suspend instruction from the storage management program 1704 of the management server 102 to suspend the virtual storage apparatus 106. Details of the suspend method of the virtual storage apparatus 106 will be described with reference to FIG.

  Next, it is assumed that the virtual storage apparatus 106 is resumed when the virtual storage system is used again. At that time, it is assumed that the old host 1902A, which has been operating conventionally, has already been discarded and the new host 1902B is used. Assume that the WWN of port 1906A of the old host is changed to the WWN of port 1906B of the new host.

  The management server 102 uses the WWN notification program 1705 to transmit such a WWN change to the physical storage device 120 before starting the new host. The WWN notification program 1705 notifies the virtual storage apparatus 106 of the WWN before the change and the WWN after the change. The change of WWN is notified from the I / F 1904 to the management I / F 1919 via the network 105. Further, the change of the WWN may be notified from the port 1906 to the port 1910 through the network 119. Specifically, the virtual storage apparatus prepares a dedicated virtual volume (referred to as a command device) for management and accesses from the management server 102. Details of the operation of the WWN notification program 1705 will be described later with reference to FIG.

  FIG. 20 is a ladder chart showing the operation restarting operation in the entire virtual storage system.

  First, the administrator of the virtual storage apparatus 106 instructs to resume the storage apparatus from the GUI screen 3102 of the management server 102 (2002). Details of the GUI screen 3102 will be described later.

  Next, the management server 102 refers to the WWN information 1702. If the host WWN has been changed, the management server 102 calls the WWN notification program from the storage management program (2003).

  The management server 102 transmits a WWN change notification to the physical storage device 120 using the WWN notification program (2004). The contents of transmission will be shown later in FIG.

  The physical storage device 120 receives a WWN change notification. When the WWN change notification reception process is completed (2005, 2006), the management server 102 transmits a resume instruction for the virtual storage apparatus 106 to the physical storage apparatus 120 using the storage management program (2007).

  When receiving the resume instruction (2007), the virtual storage apparatus 106 executes the resume process, and returns the result (normal or abnormal, the reason in case of abnormality) to the storage management program. With the storage management program 1702, the management server 102 displays the result of the resume process and the reason for abnormality as a message on the GUI screen 3102 of the management server 102. When the resume process ends normally (2008), the host administrator activates the host (2010).

  FIG. 21 is a flowchart showing the operation at the time of starting on the host side.

  When the administrator of the virtual storage apparatus 106 turns on or resumes the power of the host 103, the host 103 first activates the OS 1103 (step 2101). In general, the host 103 stores the OS 1703 in the HDD 1004 or the like inside the host 1902. When the host starts up, the OS 1703 is copied from the internal HDD 1004 to the memory 1003, and the processor 1002 executes the OS 1703 on the memory 1003. In general, the host 103 executes initial setting of hardware and the like when the OS 1703 is activated.

  Next, the host requests a device list from the port 122 of the physical storage device 120 (step 2102). The device list is a list indicating LUs accessible by the host. When requesting the device list, the host 103 notifies the physical storage device 120 of the WWN of the port 104. The WWN is an identifier used by the physical storage device 120 to uniquely identify the port 104.

  Next, the host 103 receives the device list from the physical storage device 120 (step 2103).

  Next, the host 103 recognizes the LU of the received device list as a volume (step 2104). The recognition corresponds to, for example, a volume mounting function in a general OS. After recognition, the LU is ready to read and write to the volume from an application running on the host 103.

  Next, an application is executed on the host 103 (step 2105).

  FIG. 22 is a flowchart showing the operation of the WWN change notification program.

  The management server 102 calls the WWN change notification program 1705 when the storage management program 1704 instructs the resume on the GUI screen 3102. At that time, the management server 102 designates the virtual storage device number to be resumed, the changed WWN and the changed WWN input from the GUI screen 3102.

  When the storage management program 1102 executes the WWN change notification program 1705, the management server 102 creates a WWN change notification packet 2301 (step 2201). Details of the WWN change notification packet 2301 will be described later.

  The management server 102 transmits a WWN change notification together with the created WWN change notification packet 2301 (step 2202).

  FIG. 23 is a diagram illustrating a data structure of the WWN change notification packet 2301.

  The WWN change notification packet 2301 includes a virtual storage device number 2311, a WWN 2312 after the change, a WWN 2313 before the change, and key information 2314.

  The management server 102 creates a WWN change notification packet 2301 using the WWN change notification program 1107.

  In the management server 102, the WWN change notification program inputs the resume target virtual storage device number 2311, the changed WWN 2312, and the WWN 2313 before the change received from the storage management program into the WWN change notification packet 2301. Further, the management server 102 inputs the key information 1701 held on the memory 1003 corresponding to the virtual storage device number 2311 to the WWN change notification packet 2301 to create the WWN change notification packet 2301.

  FIG. 24 is a flowchart showing the WWN change notification reception process 424 executed by the physical storage device 120.

  The physical storage device 124 executes WWN change notification reception processing in order to receive the notification of the WWN change notification program 1705 executed on the host 103 side.

  When the WWN change notification program 1705 receives the WWN change notification (step 2401), the physical storage device 124 executes an authentication process (step 2402). The physical storage device 120 securely changes the WWN by executing an authentication process. In other words, the purpose of executing the authentication process by the physical storage device 120 is to allow only a limited host that can be recognized as correct in the authentication process to change the WWN setting. The physical storage device 120 receives the key information held by the WWN change notification program 1705 on the host side in step 2401, compares it with the key information held on the storage side, and authenticates whether the key information is correct. Authentication of key information may be implemented by a generally known authentication method such as a method using a hash function or the like. Also, a method may be employed in which, when logging in to the GUI screen 3101 of the management server 102, the administrator of the virtual storage apparatus is authenticated and access to the management I / F 1111 is limited to the management server. In that case, since authentication has already been completed on the GUI screen of the management server, it is not necessary to authenticate with the key information when the WWN notification program 1705 is executed.

  As a result of the authentication process in step 2402, if the authentication is successful (Y in step 2403), the WWN change notification information 212 is rewritten. Specifically, the control processor 124 receives the WWN change notification received in step 2401, the LUN and the changed WWN contents, together with the target virtual storage device number and the port number of the received port. It adds to the information 252. If the management server 102 fails the authentication of the WWN change notification reception process (N in Step 2403), the management server 102 ends.

  In this way, only the management server 102 having the key can change the WWN by the authentication processing in step 2402, and the WWN can be changed securely.

  FIG. 25 is a diagram showing the WWN change notification information 212.

  The physical storage device 120 stores, in the WWN change notification information 252, the WWN change notification notified by the host, that is, the result received by the WWN change notification reception process 424. The WWN change notification information 252 includes a virtual storage device number 2511, a port number 2512, a LUN 2513, a change notification presence / absence information 2514, WWN information 2515 after change, and WWN information 2516 before change. The virtual storage device number 2511 indicates the virtual storage device number to which the volume that is the WWN change target belongs. A port number 2512 indicates a port to which a volume to be changed by WWN belongs. The LUN number 2513 indicates the volume for which the WWN is to be changed. The change notification presence / absence information 2514 is set to “Y” when a change notification is received from the host, and “N” when it is not received. The changed WWN information 2515 receives the changed WWN when a change notification is received from the host. When receiving a change notification from the host, the physical storage device 120 inputs the WWN before the change into the WWN information 2516 before the change.

  FIG. 26 is a flowchart showing the operation of the host command processing 223.

  When the physical storage device 120 receives a host command command from the host, host command processing 423 is executed (step 2601). Specifically, the protocol control circuit or the like built in the control processor 124 or the port 122 checks the status of the port 122 to recognize the reception of the host command command and starts executing the host command processing 423. The physical storage device 120 refers to the virtual storage resource management information 1541 and calculates a virtual storage device number corresponding to the port (step 2602). Next, the physical storage device 120 refers to the virtual storage resource management information 1561 and calculates a task from the virtual control unit corresponding to the virtual storage device 106 (step 2603).

  The subsequent steps are executed by a task that is a computational resource assigned to each virtual storage device 106. This is because each virtual storage apparatus 106 has a computing resource for performing host command processing independently for each virtual storage apparatus, thereby eliminating the performance influence on other virtual storage apparatuses as much as possible. On the other hand, until the task is calculated in step 2603, the task operating on the specific control processor 124 calculates.

  Next, the physical storage device 120 analyzes the host command command received from the host (step 2604). Specifically, the host command instruction is the type of host command, which LUN the command is for, and the like.

  When the type of the host command is a device list request (Y in Step 2609), the physical storage device executes device list notification processing (Step 2610). The device list notification process will be described below. The host 103 transmits a login request. Then, the physical storage device 120 receives the port WWN transmitted by the host 103. Then, the physical storage device 120 refers to the LUN security information 403 of the virtual storage device 106 corresponding to the received port 122, and is a list of LUNs that are accessible from the port number and WWN received from the host, that is, a list of LUNs. Send device list to host. The above is the processing content of the device list notification processing.

  As a result of the analysis in step 2604, if the host command type is not a device list request (N in step 2609) and the host command type is an I / O request (Y in step 2605), I / O processing is performed. Execute. The I / O process will be described below. In the control unit 123, frequently accessed data is arranged in the cache memory for the purpose of improving the performance of I / O processing. In addition, the control unit 123 manages which storage area data is arranged on the cache memory. If the data is not in the cache memory (cache miss), the control unit 123 refers to the LUN mapping information 404 from the LUN analyzed in step 2604, examines the target virtual volume number 612, and virtual storage resource management information 1521. To check the resource volume number 1533. Further, the physical storage control information 410 is referred to, the resource volume number 1533 is checked, and the physical position to which the resource volume belongs is checked from the parity group information 1026. When the data is on the cache memory (cache hit), the virtual storage resource management information 1501 is referred to determine the corresponding cache area 1512, the resource cache memory control information 902 is referred to, and the physical corresponding to the cache area is obtained. The memory slot number 1345 of the position and the offset are obtained (step 2606). Next, in the case of a write command, the control unit 123 executes data transfer from the host side to the physical location specified in Step 2606. In the case of a read command, the control unit 123 executes data transfer from the physical position specified in Step 2606 to the host side (Step 2607). When the transfer is completed, the physical storage device 120 notifies the host of a completion message (step 2608). The above is the description of the I / O processing.

  Of the host command processing described above, steps 2601 to 2603 may be processed by the control processor 124 of the control unit 123 or may be executed by a protocol control circuit built in the port 122.

  FIG. 27 is a flowchart showing the operation of the suspend process 421 of the virtual storage apparatus 106.

  The administrator of the virtual storage device 106 instructs suspend from the GUI of the management server 102. Then, the management server 102 transmits a suspend instruction to the virtual storage apparatus 106 via the network 105 and the management I / F 107. Then, the suspend process 421 of the virtual storage device 106 is executed.

  When the suspend process 221 is executed, the physical storage device 120 disables the command process, that is, ignores the command command from the host 103 (step 2701).

  Next, the physical storage device 120 saves the write data on the cache memory to the volume (step 2702). This is because the cache memory is implemented by a volatile memory such as a RAM. When the write data on the cache memory is not reflected on the disk, the write data on the cache memory is volatilized and cannot be restored when the power of the cache memory is turned off.

  Next, the physical storage device 120 stores the virtual storage control information 201 in the physical storage device 129 that is the storage destination of the storage image data 1601 (step 2703).

  Next, the physical storage device 120 stores the volume data in the physical storage device 129 that is the storage destination of the storage image data 1601 (step 2704).

  Step 2704 is executed for all virtual volumes included in the suspended virtual storage apparatus 106 (step 2705).

  When the execution is completed for all the virtual volumes included in the virtual storage apparatus 106 to be suspended, a resource release process is executed (step 2706).

  After the virtual storage device 106 is suspended, the physical storage device 129 may be turned off.

  FIG. 28 is a flowchart showing the operation of resource release processing in the suspend processing of the virtual storage apparatus 106.

  When the resource release process is executed, the physical storage device 120 first determines a resource to be released (step 2801). Specifically, the control processor 124 refers to the virtual storage resource management information 411. Then, the control processor 124 determines the resource assigned to the virtual storage device number to be suspended as a resource to be released and released.

Next, the control processor 124 updates the virtual storage resource management information 411 and physical storage control information corresponding to the resource to be released (step 2802). Specifically, the following three points are implemented.
(1) The control processor 124 sets the usage state of the control information (resource volume control information 3201, resource cache memory control information 902, resource task control information 903) of the resource to be released / released to “unused”.
(2) The control processor 124 deletes the item corresponding to the resource to be released from the items of the virtual storage device number to be suspended in the virtual storage resource management information 411.
(3) When the resource to be released is a resource volume, the control processor 124 first refers to the resource volume control information 901 and obtains a parity group number 1026 corresponding to the resource. Thereafter, the control processor 124 refers to the parity group control information 904 to obtain a physical disk number list 1112 corresponding to the parity group. Thereafter, the control processor 124 refers to the physical disk control information 905 for the physical disk numbers included in the physical disk number list 1112 and changes the power supply counter 1213 to a value obtained by subtracting one.

  Next, the physical storage device 120 checks whether the power can be turned off for each resource to be released (step 2803).

  Specifically, the control processor 124 first obtains a physical resource corresponding to the resource to be released.

  When the resource to be released is the resource cache memory, the control processor 124 refers to the resource cache memory control information 902 and obtains the memory slot number 1345 of the physical resource corresponding to the resource. Thereafter, the control processor 124 checks whether or not all the usage states 1344 corresponding to the memory slot numbers are unused. Only when all of the usage states 1344 are unused, the physical resource is a target to be turned off.

  When the resource to be released is a resource task, the control processor 124 refers to the resource task control information 903 and obtains the task number 1466 of the physical resource corresponding to the resource. Thereafter, the control processor 124 obtains the control processor number 1465 corresponding to the task number, and checks whether or not all the usage states 1464 corresponding to the control processor number 1465 are unused. Only when all the usage states 1464 are unused, the physical resource is the target of power-off.

  When the resource to be released is a resource volume, first, the control processor 124 refers to the resource volume control information 901 and obtains a parity group number 1026 corresponding to the resource. Thereafter, the control processor 124 refers to the parity group control information 904 to obtain a physical disk number list 1112 corresponding to the parity group. Thereafter, the control processor 124 checks the physical disk control information 905 for the physical disk numbers included in the physical disk number list 1112. The control processor 124 sets only the physical drive for which the value of the power supply counter 1213 is 0 as the target of power OFF.

  Supplementally, when starting the target physical resource, the control processor 124 adds 1 to the value of the power supply counter 1213. When this power supply counter is 0, it indicates that the physical resource is not assigned to any virtual storage device 106. Details will be described with reference to the flowchart of the resource preparation process of FIG. In step 2805 of resource release processing and step 3007 of resource preparation processing, which will be described later, the physical storage device 120 updates the power supply counter or the usage state so as to indicate the presence or absence of the virtual storage device 106 that uses the resource. To do.

  Next, when the physical resource is a target to be turned off (Y in Step 2803), the power is turned off (Step 2804). Specifically, in the case of a hard disk, the power-off process may be a spin-down process or a process of completely stopping the power.

  If the physical resource is not the target to be turned off (N in Step 2803), the control processor 124 advances the process to Step 2806.

  Next, the control processor 124 updates physical storage control information corresponding to the physical resource whose power is to be turned off (step 2805).

  Specifically, when the physical resource whose power is to be turned off is a memory slot, the control processor 124 turns off the power state 1342 corresponding to the target memory slot number 1345 in the resource cache memory control information 902.

  When the physical resource whose power is to be turned off is a physical drive, the control processor 124 turns off the power state 1212 corresponding to the target physical disk number in the physical disk control information 905.

  When the physical resource whose power is to be turned off is the control processor 124, the control processor 124 turns off the power state 1462 corresponding to the target control processor number 1465 in the resource task control information 903.

  If all the resources have not been processed (N in Step 2806), the process proceeds from Step 2802 for the next resource. When all the resources have been processed (Y in step 2806), the process ends.

  The control unit 123 is equipped with a control circuit that can turn on the power of the control processor 124. When the storage device is resumed, the management server communicates with the control circuit and first turns on the power of the control processor 124. Next, the control processor 124 turns on the power for the related resource such as a physical drive. When the storage apparatus is suspended, the control processor 124 itself turns off the power of the control processor 124 after turning off the power of the related resource such as a physical drive.

  In addition, one or more reserved control processors may be prepared, and the reserved control processors may be resumed by removing them from the power-off target.

  FIG. 29 is a flowchart showing the operation of the resume process 422 of the virtual storage apparatus 106.

  The administrator of the virtual storage apparatus 106 instructs resumption from the GUI of the management server 102. Then, the management server 102 transmits a resume instruction to the virtual storage apparatus 106 via the network 105 and the management I / F 107. Then, the resume process 422 of the virtual storage device 106 is executed.

  When the resume process is executed, the physical storage device 120 first reads virtual storage control information from the storage image data 1601 stored in the physical storage device 129 or the like onto the control memory 125 (step 2901). When the physical storage device 129 is turned off during suspension, the physical storage device 120 turns on the physical storage device 129 in order to read the virtual storage control information 401 into the control memory 125.

  Next, the physical storage device 120 prepares resources (step 2902). The resource preparation process will be described later using another flowchart. When the resource preparation process is completed, the virtual volume or the like can be used by turning on the power of the resource of the virtual storage apparatus 106.

  Next, the physical storage device 120 recovers the volume data from the storage image data 1601 to a virtual volume (step 2903).

  Next, the physical storage device 120 recovers the virtual storage control information from the storage image data 301 to the control memory 125 (step 2904).

  Next, the physical storage device 120 checks the WWN change notification information 412 (step 2905). The WWN change notification information 412 is information that is notified to the physical storage device 120 when a WWN change of the port 104 of the host 103 is detected.

  Next, when the LUN security information 403 needs to be changed (Y in Step 2906), the WWN of the LUN security information 403 is changed (Step 2907). Specifically, the physical storage device 120 refers to the change notification presence / absence 2514 in the item of the target virtual storage device number in the WWN change notification information 412. For the item for which the change notification presence / absence 2514 is Y, the changed WWN 2515 is changed to the WWN of the LUN security information 403.

  Next, the physical storage device 120 enables host command processing (step 2908). Specifically, the physical storage device 120 makes it possible to recognize the reception of the host command command by starting the check of the state of the port by the protocol control circuit or the like built in the control processor 124 or the port 122. If a command request from the host or the LUN security information 403 need not be changed (N in Step 2906), the process proceeds to Step 2908.

  As described above, in the first embodiment, the host 1902 notifies the physical storage device 120 of a new WWN by the WWN change notification program 1705. In step 2907, the physical storage device 120 updates the WWN of the old port in the LUN security information 403 to the WWN of the new port. As a result, in the device list notification process (step 2610), the physical storage device 120 also provides a device list having the same contents as the device list transmitted to the host 1902 before the suspension of the virtual storage device 106 for the new WWN. It can be sent to the host 1902. Therefore, even when the host 1902 changes the WWN after the virtual storage apparatus 106 is suspended, the host 1902 can access the volume accessed before the suspension.

  FIG. 30 is a flowchart showing the resource preparation process in the resume process of the virtual storage apparatus 106.

  First, when executing the resource preparation process, the physical storage device 120 obtains necessary resource requirements from the virtual storage configuration information 205 (step 3001). The virtual storage configuration information 405 represents the specifications of the virtual storage device 106. For example, if the cache size is “256 MB”, the control processor 124 needs to secure a 256 MB cache memory to resume the virtual storage apparatus 106.

  Next, the physical storage device 120 searches for free resources (step 3002). Specifically, the control processor 124 refers to the usage statuses 1024, 1344, and 1464 of the control information (resource volume control information 901, resource cache memory control information 902, resource task control information 903) of the resources to be secured, Search for “unused” resources.

  If there is no free resource as a result of the search in Step 3002 (N in Step 3003), a warning message is displayed on the management screen of the management server 102, and the virtual storage device 106 administrator cannot resume because there is no free resource. (Step 3008). Details of the management screen of the management server 102 will be described with reference to FIG.

  If there are free resources as a result of the search in Step 3002 (N in Step 3003), the virtual storage resource management information 411 and physical storage control information corresponding to the resources to be secured are updated (Step 3004).

Specifically, the following three points are implemented.
(1) The control processor 124 sets the usage state of the control information (resource volume control information 901, resource cache memory control information 902, resource task control information 903) of the resources to be secured to “in use”.
(2) The control processor 124 adds an item of the virtual storage device number to be resumed to the virtual storage resource management information 411.
(3) When the resource to be secured is a resource volume, the control processor 124 first refers to the resource volume control information 901 and obtains a parity group number 1026 corresponding to the resource. Thereafter, the control processor 124 refers to the parity group control information 904 to obtain a physical disk number list 1112 corresponding to the parity group. Thereafter, the control processor 124 refers to the physical disk control information 905 for the physical disk numbers included in the physical disk number list 1112 and changes the power supply counter 1213 to a value obtained by adding one.

  After that, the physical storage device 120 checks whether the power is already turned on (step 3005).

  Specifically, the control processor 124 first obtains a physical resource corresponding to the resource to be secured. When the resource to be secured is the resource cache memory, the control processor 124 refers to the resource cache memory control information 902 and obtains the memory slot number 1345 of the physical resource corresponding to the resource. Thereafter, the control processor 124 checks whether the power supply state corresponding to the memory slot number is ON. Only when the power state is OFF, the physical resource is the target of power ON.

  When the resource to be secured is a resource task, the control processor 124 refers to the resource task control information 903 and obtains the task number 1466 of the physical resource corresponding to the resource. Thereafter, the control processor 124 obtains a control processor number 1465 corresponding to the task number, and checks whether the power supply state corresponding to the control processor number 1465 is ON. Only when the power state is OFF, the physical resource is the target of power ON.

  When the resource to be secured is a resource volume, the control processor 124 first refers to the resource volume control information 901 and obtains a parity group number 1026 corresponding to the resource. Thereafter, the control processor 124 refers to the parity group control information 904 to obtain a physical disk number list 1112 corresponding to the parity group. Thereafter, the control processor 124 checks the physical disk control information 905 for the physical disk numbers included in the physical disk number list 1112 and checks whether the power state is ON. Only when the power state is OFF, the physical resource is the target of power ON.

  If the power state of each physical resource is “ON” (Y in step 3005), the process proceeds to step 3009. If “OFF” (N in step 3005), the power of the resource is turned on (step 3006).

  Specifically, in the case of a hard disk, the process of turning on the power may be a spin-up process or a process of turning on the power after the power is completely stopped.

  Next, the physical storage device 120 updates the physical storage control information corresponding to the physical resource to be turned on (step 3007).

  Specifically, when the physical resource to be turned on is a memory slot, the control processor 124 turns on the power state 1342 corresponding to the target memory slot number 1345 in the resource cache memory control information 902.

  When the physical resource to be turned on is the control processor 124, the control processor 124 turns on the power state 1462 corresponding to the target control processor number 1465 of the resource task control information 903.

  When the resource to be turned on is a physical drive, the control processor 124 turns on the power state 1212 corresponding to the target physical disk number 1211 in the physical disk control information 905.

  After step 3007, if a series of processing (from step 3003 to step 3007) has not been performed for all necessary resources obtained in step 3001 (N in step 3009), the free resources for the next necessary resource Search (step 3002) is performed. If a series of processing has been performed (Y in step 3009), the processing ends.

  In this way, the physical storage device 120 updates the virtual storage resource management information 411 and the physical storage control information 410 in step 2802 and step 3004, so that the resource of the virtual storage device 106 secured at that time is updated. Hold information in control memory. As a result, the physical storage device 120 can determine the resources to be released when suspending in units of the virtual storage device 106 in step 2801 and the resources to be secured when resuming in step 3001.

  In addition, when the virtual storage apparatus 106 is suspended, the physical storage apparatus 120 refers to the power supply counter or the use state in step 2803. Therefore, it is possible to prevent the administrator of the virtual storage apparatus 106 from accidentally turning off the power when the virtual storage apparatus 106 that uses the physical resource still remains.

  Further, in step 2703 of FIG. 27, the physical storage device 120 saves the storage image data 1601 to the external volume. Then, the physical storage device releases each resource including the virtual volume of the virtual storage device 106. Then, when resuming another virtual storage apparatus 106, the physical storage apparatus searches for free resources in steps 3002 to 3006 in FIG. Then, the resources released by the virtual storage device 106 can be used. As a result, the resources of the physical storage device 120 are effectively utilized as the entire virtual storage system. For example, assume that the virtual storage device 106 is a high-performance online storage with a high bit cost, and the physical storage device 129 is a tape storage with a low performance and a low bit cost. The administrator of the virtual storage apparatus 106 stores the volume data and control information of the virtual storage apparatus 106 that will not be used for a while in the tape storage. In this way, the administrator can use the virtual storage device 106 that he / she wants to use on the high-performance physical storage device 120.

  FIG. 31 is a diagram showing a screen 3101 of the management server 102 of the virtual storage apparatus 106.

  The management server 102 has a screen 3101. A GUI screen 3102 of the storage management program 1102 is displayed on the screen 3101.

  The GUI screen 3102 has a menu unit 3103 and a setting unit 3104. In the menu portion 3103, each setting item is displayed in a tree shape. Information 3121 for identifying the virtual storage apparatus 106 is displayed in the menu section. For example, in FIG. 31, the name of the virtual storage device 106 “virtual storage device A” is displayed.

  In the menu section, setting items for the virtual resource list 3122 and the power management 3121 are displayed below the information 3121 for identifying the virtual storage device 106.

  The virtual resource list 3122 is a setting item for displaying the state of the virtual resource held by the virtual storage apparatus 106 to be managed and setting the virtual resource.

  The power management 3123 is a setting item for displaying settings and a state for suspending and resuming the virtual storage apparatus 106 to be managed on the setting unit.

  When the administrator of the virtual storage apparatus 106 selects the power management 3121, setting items related to suspend and resume are displayed on the setting unit 3104.

  On the suspend setting screen 3111, setting items for suspending the virtual storage apparatus 106 are displayed. In the suspend destination designation 3112, the administrator of the virtual storage apparatus 106 designates a virtual volume number for transferring volume data and control information during suspension. For example, the administrator of the virtual storage device 106 designates the virtual volume number of the circumscribed volume.

  On the resume setting screen 3113, setting items for resuming the virtual storage apparatus 106 are displayed. In the resume source designation 3114, the administrator of the virtual storage apparatus 106 designates the resume source virtual volume number. For example, the administrator of the virtual storage device 106 designates the virtual volume number of the circumscribed volume.

  When the execute button 3116 is pressed, the management server 102 transmits a suspend or resume instruction to the physical storage device 120 by the storage management program 1704 with the contents set by the setting unit 3104. At the time of resumption, the management server 102 executes the WWN change notification program 1705 by the storage management program 1704.

When the management server 102 transmits a resume instruction for the virtual storage device 106 and the physical storage device 120 has insufficient resources, a message 3105 “Resuming is not possible due to insufficient resources” is displayed on the GUI screen 3102. As a result, the administrator of the virtual storage apparatus 106 is notified that the resume is impossible.
(Second Embodiment)
In this embodiment, an example is shown in which power management of physical resources of a storage apparatus is performed in units called packages (PK).

  Hereinafter, the difference between the second embodiment and the first embodiment will be described.

  FIG. 32 shows a physical configuration of the storage apparatus in the virtual storage system according to the second embodiment of the present invention.

  The back-end package 3211 includes a disk package 3216 including a physical disk and a back-end port package 3217 including a port for communicating with the physical disk and the external storage device 129.

  The front end package 3212 is a package including a port.

  The data bus 3213 is a device that executes communication processing such as data transfer between packages. The processor package 3215 is a package including a control unit such as the control processor 124 and the control memory 125. Since there may be a plurality of control units in the processor package 3215 and a plurality of processor packages 3215, a plurality of control processors 124 may physically exist. Each control processor 124 accesses the cache memory in the cache memory package 3214 through the data bus 3213, and can arrange various control information on the control memory on the cache memory. Each control processor 124 can share various control information on the cache memory with the control processor 124 of another control unit. In addition, in this embodiment and later, when there is no supplementary explanation, it is assumed that various control information is arranged in the control memory 125, and various control information is arranged in the cache memory and shared in the physical storage device 120. I will explain it.

  The cache memory package 3214 is a package including a cache memory.

  Note that the cache memory package 3214 including the cache memory used as the control memory 125 cannot be turned off as long as the control processor 124 that accesses various shared control information exists.

  Therefore, when using the cache memory of the fixed cache memory package 3214 as an alternative to the control memory, each control processor 124 of the physical storage device 120 adds 1 to the value of the power supply counter 3314 of the cache memory package 3214 in advance, Control so as not to turn off the power. Details of the power supply counter 3314 will be described later.

  FIG. 33 shows the data structure of the package resource correspondence information 3301.

  The package resource correspondence information 3301 includes a package number 3311, a package type 3312, a resource list 3313, a power supply counter 3314, and a power supply state 3315. Package information is stored in the control memory 125 of the physical storage device 120.

  The package number 3311 is a number for identifying a package.

  The package type 3312 represents a package type. The package type includes “processor package” including one or more control units, “cache memory package” including one or more cache memories, “disk package” including one or more physical disks, and a port communicating with the host. There are two types of “front end package” including one or more and “back end port package” including one or more ports communicating with the physical disk or the external storage device 129.

  The resource list 3313 is a list of resources included in each package. The value of the power supply counter 3314 represents the number of virtual storage apparatuses 106 that are using the package. A method for updating the value of the power supply counter 3314 will be described with reference to FIGS. The power supply state 3315 indicates whether the power supply of each package is ON or OFF.

  FIG. 34 is a flowchart showing resource release processing in this embodiment.

  FIG. 34 differs from FIG. 28 in steps 3401 to 3404.

The physical storage device 120 updates the virtual storage resource management information 411 and the package resource correspondence information 3301 corresponding to the resource to be released in the resource release process (step 3401). Specifically, the following three points are implemented.
(1) The control processor 124 sets the usage state of the control information (resource volume control information 901, resource cache memory control information 902, resource task control information 903) of the resource to be released to “unused”.
(2) The control processor 124 deletes the item corresponding to the resource to be released from the items of the virtual storage device number to be suspended in the virtual storage resource management information 411.
(3) The control processor 124 subtracts 1 from the value of the power supply counter 3314 corresponding to the resource to be released in the package resource correspondence information 3301. However, if another resource has already been subtracted from the value of the power supply counter 3314 of the same package number 3311 between the start and end of this flowchart, the value is not subtracted.

  Next, the physical storage device 120 checks whether the power can be turned off for each resource to be released (step 3402).

  Specifically, only packages whose power supply counter 3314 value of the package resource correspondence information 3301 is 0 are targeted for power off.

  Next, when the physical resource is a target to be turned off (Y in Step 3402), the physical storage device 120 turns off the power of the package (Step 3403). If the physical resource is not a target to be turned off (N in Step 3402), the process proceeds to Step 2806.

  Next, the package resource correspondence information 3301 corresponding to the package whose power is to be turned off is updated (step 3403).

  Specifically, the control processor 124 turns off the power state 3315 of the package resource correspondence information 3301.

  The other resource release processing operations are the same as those described with reference to FIG.

  FIG. 35 is a flowchart showing resource preparation processing in the present embodiment.

  FIG. 35 differs from FIG. 30 in steps 3501 to 3504.

The physical storage device 120 updates the virtual storage resource management information 411 and the package resource correspondence information corresponding to the free resource found in step 3002 (step 3501). Specifically, the following three points are implemented.
(1) The control processor 124 sets the usage state of the control information (resource volume control information 901, resource cache memory control information 902, resource task control information 903) of the resources to be secured to “in use”.
(2) The control processor 124 adds an item of the virtual storage device number to be resumed to the virtual storage resource management information 411.
(3) Add 1 to the value of the power supply counter 3314 corresponding to the resource to be secured in the package resource correspondence information 3301. However, when another resource is processed for the value of the power supply counter 3314 of the same package number 3311 between the start and the end of this flowchart, the value is not added.

  Next, the control processor 124 checks whether the resource has already been turned on (step 3502).

  Specifically, only packages whose value of the power state 3315 of the package resource correspondence information 3301 is “OFF” are targets for power ON.

  Next, if the physical resource is already powered on (Y in step 3502), the process proceeds to step 3009. If the physical resource is a target to be powered on (N in step 3502), the physical storage device 120. Turns on the power of the package (step 3503).

  Next, the physical storage device 120 updates the package resource correspondence information 3301 corresponding to the package to be turned on (step 3504).

  Specifically, the control processor 124 changes the power state 3315 of the package resource correspondence information 3301 to “ON”.

  The operation of other resource preparation processes is the same as the operation described with reference to FIG.

  As described above, when the virtual storage apparatus 106 is suspended and resumed, the power supply counter 3314 of the package resource correspondence information 3301 is updated. In step 3401 and step 3501, the power supply counter 3314 is updated to represent the number of virtual storage devices 106 being used.

When the virtual storage apparatus 106 is suspended, the power supply counter 3314 of the package resource correspondence information 3301 is referred to in step 3402. Then, the presence / absence of the virtual storage device 106 in use is determined. For this reason, even when resources in the same package are shared between virtual storage apparatuses, the administrator of the virtual storage apparatus 106 can turn off the power without affecting other virtual storage apparatuses 106. it can.
(Third embodiment)
In the present embodiment, a method for suspending and resuming a virtual storage apparatus in a modular storage that is a storage provided by combining a plurality of modules as one storage apparatus will be described.

  Hereinafter, a difference between the third embodiment and the first and second embodiments will be described.

  FIG. 36 shows a physical configuration of a virtual storage system according to the third embodiment of the present invention.

  The module 3602 includes a processor package 3215, a cache memory package 3214, a front end package, a back end package, and a data bus.

  The processor package has a control unit, the cache memory package has a plurality of cache memories, the front end package has a plurality of ports, and the back end package has a disk package including a plurality of disks and a port including a plurality of ports. Have a package.

  The modular storage 3601 is a storage provided by combining a plurality of modules 3602 as one storage device. Since the inside of the module 3602 is equivalent to the hardware described in the second embodiment, the description thereof is omitted.

  When the resume processing of the virtual storage apparatus 106 is executed in the module type storage 3601, resources may be secured from a plurality of different modules 3602. At this time, performance is affected.

  For example, it is assumed that the result of suspending and resuming the virtual storage device 3604A is the virtual storage device 3604B. The resumed virtual storage apparatus 3604B is different in the physical disk and the module in which the port exists. For this reason, when the data read from the physical disk by the control unit is transferred to the port, it is necessary to perform data communication through the path 3603 between the modules. In the modular storage, data communication using the data bus in the module can be processed at high speed, but data communication between modules is slower than data communication using the data bus in the module. Therefore, when the virtual storage apparatus 106 is resumed with resources existing in a plurality of different modules, a performance impact occurs.

  Therefore, in this embodiment, the physical storage device 120 selects resources in the same module as much as possible at the time of resumption so that the performance influence does not occur as much as possible when the virtual storage device 106 is resumed. The method will be specifically described below.

  FIG. 37 shows the data structure of module information 3701.

  The module information 3701 is a table showing the correspondence between the module number 3711 and the resource list 3712 representing a set of resources belonging to the module.

  The module number 3711 is a number representing a module existing in the storage apparatus.

  The resource list 3712 represents a set of resources existing in the module. The control processor 124 inputs numbers such as a resource task, a resource cache memory, and a resource volume into the resource list 3712.

  FIG. 38 is a flowchart showing the resource preparation process in the resume process.

  FIG. 38 differs from FIG. 30 in steps 3801 to 3811.

  For the necessary resource requirements obtained in step 3001, the control processor 124 executes an in-module requirement check process (step 3801). The control processor 124 executes an in-module requirement check process, and checks whether or not the resource requirement is satisfied with only the resources in the designated module. If the resource requirement is satisfied, the control processor 124 inputs the set of resources to be satisfied into the resource preparation list. If the resource requirement is not satisfied, the control processor 124 empties the resource preparation list. Details of the in-module requirement check process will be described with reference to FIG.

  If the resource preparation list is empty (Y in step 3802), the control processor 124 executes processing for other modules existing in the physical storage device 120 (N in step 3803). When all the modules existing in the physical storage device 120 have been searched (Y in Step 3803), the control processor 124 executes a physical storage device requirement check process (Step 3804). The control processor 124 executes a physical storage device requirement check process to check whether or not the resources in the physical storage device 120 satisfy the resource requirement. If the resource requirement is satisfied, the control processor 124 inputs the set of resources to be satisfied into the resource preparation list. If the resource requirement is not met, the control processor 124 empties the resource preparation list. Details of the physical storage device requirement checking process will be described with reference to FIG.

  If the resource preparation list is empty as a result of executing the physical storage device requirement check processing (Y in step 3805), the management server 102 displays a warning message because there is no free resource in the physical storage device 120 (step 3008). .

  When the resource preparation list is not empty (N in Step 3805), the management server 102 displays a performance influence message (Step 3806). The performance influence message informs the administrator of the virtual storage apparatus 106 that a performance influence will occur when the virtual storage apparatus 106 is resumed using resources existing in a plurality of different modules.

  A method for displaying the performance influence message will be specifically described. The control processor 124 of the physical storage device 120 transmits a command for displaying a performance impact message to the management server 102, and the management server 102 receives the command, and the performance impact message is displayed. In the future explanation, when a message is displayed on the management server 102, unless otherwise explained, it is displayed in the same manner.

  In the performance influence message, “automatic setting”, “manual setting”, and “cancel” are displayed. The administrator of the virtual storage apparatus 106 can select one of them.

  When the administrator of the virtual storage apparatus 106 selects “automatic setting” (N in Step 3807, N in Step 3810), the control processor 124 executes a resource securing process (Step 3811). The resource securing process is performed for the resource input to the resource preparation list as a result of the physical storage device requirement check process executed in step 3804. After the resource securing process is executed, the resource preparation process ends. The resource securing process will be described with reference to FIG.

  When the administrator of the virtual storage apparatus 106 selects “manual setting” (Y in step 3807), the management server 102 displays a manual setting screen (step 3808).

  When the physical storage device 120 receives the result input by the administrator of the virtual storage apparatus 106 on the manual setting screen, a resource preparation list is created from the contents of the manual setting screen (step 3809). Thereafter, the control processor 124 executes a resource securing process for the resource input to the resource preparation list (step 3811), and ends the resource preparation process.

  When the administrator of the virtual storage apparatus 106 selects “Cancel” (N in Step 3807, Y in Step 3810), the resource preparation process is completed and the resume process is interrupted.

  If the resource preparation list is not empty (N in step 3802), the virtual storage apparatus 106 can be resumed with resources in the same module. In that case, a resource securing process 3810 is executed for the resource input to the resource preparation list as a result of the in-module requirement check process in step 3801, and the resource preparation process is terminated.

  FIG. 39 is a flowchart showing the in-module requirement check process.

  The control processor 124 checks whether or not the resource requirement is satisfied only by the resource in the designated module as the in-module requirement check process. If the resource requirement is satisfied, the control processor 124 inputs a set of resources to be satisfied into the resource preparation list. If not, the control processor 124 empties the resource preparation list. Hereinafter, the in-module requirement check process will be described step by step.

  When the control processor 124 starts the in-module requirement check process, it searches for a free resource corresponding to a necessary resource in the target module (step 3901). The control processor 124 can grasp in which module the resource exists by referring to the module information 3901.

  If there is no free resource as a result of the search in step 3901 (N in step 3902), the control processor 124 clears the prepared resource list (step 3905) and ends the in-module requirement check process.

  If there is a free resource as a result of the search in step 3901 (Y in step 3902), the control processor 124 adds the found free resource to the prepared resource list (step 3903). If the search has not been performed for all required resources (N in step 3904), the control processor 124 returns to step 3901 to search repeatedly for the next required resource. When the search is performed for all necessary resources (Y in Step 3904), the control processor 124 ends the intra-module requirement check process.

  FIG. 40 is a flowchart showing the physical storage device internal requirement check processing.

  The physical storage device 120 checks whether each resource of the physical storage device 120 satisfies the resource requirement by the physical storage device requirement check process. The physical storage device 120 is a process of inputting a set of resources to be satisfied to the resource preparation list when the resource requirement is satisfied, and emptying the resource preparation list when not satisfying the resource requirement.

  When the control processor 124 starts the in-physical storage device requirement check process, free resources corresponding to necessary resources are searched for in the physical storage device 120. Thereafter, the processing proceeds in the same manner as the in-module requirement check processing described in FIG.

  FIG. 41 is a flowchart showing the resource securing process in the resource preparation process.

  41 differs from FIG. 35 in steps 4101 and 4102.

  The control processor 124 turns on the power of each element of the prepared resource list 4401 and updates the related virtual storage resource management information 411 and package resource correspondence information. Each step of the resource securing process will be described below.

  The control processor 124 starts a power ON process for each element of the prepared resource list 4401 (step 4101). Thereafter, the processing proceeds in the same manner as in steps 3501 to 3503 described in the resource release processing of FIG. Next, the control processor 124 processes the next resource in the preparation resource list 4401 when the processing is not performed for all the resources in the preparation resource list 4401 (N of 4102). If the control processor 124 has performed processing for all resources in the prepared resource list 4401 (Y in 4102), the processing is terminated.

  FIG. 42 is a diagram showing a GUI screen 3101 of the management server 102.

  42 differs from FIG. 31 in 4201 to 4204.

  The management server 102 receives an instruction to display a performance influence message from the physical storage apparatus 120 in step 3806. Then, the management server 102 displays a performance influence message 4201 on the GUI screen 3102 of the storage management program 1704 operating on the management server 102.

  The performance impact message 4201 includes a message “Performance impact may occur due to use of resources across multiple modules”, an automatic setting button 4202, a manual setting button 4203, and a cancel button 4204. .

  When the administrator of the virtual storage apparatus 106 presses the automatic setting button 4202, the physical storage apparatus 120 is notified that the administrator of the virtual storage apparatus 106 has selected automatic setting. As a result, the physical storage device 120 executes step 3811.

  When the administrator of the virtual storage apparatus 106 presses the manual setting button 4203, the physical storage apparatus 120 is notified that the administrator of the virtual storage apparatus 106 has selected manual setting. As a result, the physical storage apparatus 120 executes step 3809.

  When the administrator of the virtual storage apparatus 106 presses a cancel button 4204, the physical storage apparatus 120 is notified that the administrator of the virtual storage apparatus 106 has selected automatic setting. In response to this, the physical storage device 120 ends the resource preparation process and interrupts the resume process.

  FIG. 43 is a diagram showing a manual setting screen of the GUI screen 2202 of the management server 102.

  The manual setting screen 4301 includes a menu 4311, a free resource list 4312, a reserved resource list 4313, an add button 4314, and a delete button 4315.

  When the administrator of the virtual storage apparatus 106 selects a resource classification such as “control unit” or “cache” for each module from the menu 4311, the management server 102 displays a list of free resources existing in the module as a free resource list. Displayed at 4312. When the administrator of the virtual storage apparatus 106 selects a resource from the free resource list 4312 and presses the add button 4314, the management server 102 adds the selected resource to the reserved resource list 4313 and displays it. When the administrator of the virtual storage apparatus 106 selects a resource from the reserved resource list 4313 and presses the delete button 4315, the management server 102 deletes and displays the selected resource from the reserved resource list. When the administrator of the virtual storage apparatus 106 presses the execute button 4316, the management server 102 transmits the contents of the reserved resource list to the physical storage apparatus 120.

  FIG. 44 shows the data structure of the resource preparation list.

  The resource preparation list 4401 includes a combination of a resource type 4411 and a resource number 4412 as elements. Also, the resource preparation list 4401 may include one or more module resources (module 1 resource 4402A and module 2 resource 4402B).

  In this way, the physical storage device 120 first refers to the module information 3701 in step 3801 when the virtual storage device 106 is resumed. The physical storage device 120 examines whether each module can be resumed with the resources of the same module, and gives priority to assigning the resources in the same module to the virtual storage device 106. As a result, resource allocation across modules that cause overhead is prevented, and the influence on performance is suppressed.

Furthermore, even when a resource cannot be allocated to a virtual storage device using only a single module, the administrator can issue an appropriate allocation instruction by using the performance influence message 4201 and the manual setting screen 4301 to suppress resource allocation across modules. it can.
(Fourth embodiment)
In the present embodiment, a method of suspending a virtual storage device that has been operating in a physical storage device and resuming the virtual storage device in another physical storage device will be described.

  Hereinafter, the difference between the fourth embodiment and the first embodiment will be described.

  FIG. 45 shows a physical configuration of a virtual storage system according to the fourth embodiment of the present invention.

  An external storage device 129 is shared by a network 119B such as a SAN. The physical storage device 120A writes the storage image data 1601 to the external storage device 129 when the virtual storage device 4502A is suspended. The physical storage device 120B reads the storage image data 1601 written to the external storage device 129 when the virtual storage device 4502B is resumed.

  FIG. 46 is a ladder chart during resume in the fourth embodiment.

  46 differs from FIG. 20 in 4601 and 4602. FIG.

  When the business is resumed, the administrator of the virtual storage apparatus 106 or the administrator of the host 103 connects the external storage apparatus 129 to the port 128B of the physical storage apparatus 120B that is the resume destination (4601). The connection may be via the network 119B, or may be disconnected from the port 128A and directly connected to the port 128B. If the physical storage device 129 is already connected to the physical storage 120B via the network 119B, 4601 can be omitted.

  Next, the administrator of the virtual storage apparatus 106 designates the physical storage apparatus 120 that is the resume destination from the GUI screen 2202 of the management server 102. (4602). Specifically, the administrator of the virtual storage apparatus 106 specifies a number or ID assigned to each physical storage apparatus 120.

  Since the subsequent processing is the same as that of the first embodiment, the description thereof is omitted.

  FIG. 47 is a diagram showing a GUI screen 3102 of the management server 102.

  FIG. 46 is different from FIG. 31 in 4701.

  The resume setting screen 3113 includes a resume destination physical storage device designation item 4701. The administrator of the virtual storage apparatus 106 designates the number and ID assigned to each physical storage apparatus 120 in the physical storage apparatus designation item 4701. When the administrator of the virtual storage apparatus 106 presses the execute button 3116, the management server 102 communicates with the physical storage apparatus specified in the physical storage apparatus specifying item 4701 by the storage management program and the WWN change program, and performs the various types described in the first embodiment. Execute the process.

  Since other setting items on the GUI screen 3102 of the management server 102 are the same as those in the first embodiment, the description thereof is omitted.

As described above, the external storage device 129 storing the storage image data 1601 is shared between the plurality of physical storage devices (120A, 120B) via the network 119B. Then, another physical storage device at the resume destination refers to the storage image data 1601 and executes the resume process. Thus, the virtual storage device 106 can be resumed by a physical storage device 120B different from the physical storage device 120A in which the virtual storage device 106 is suspended.
(Fifth embodiment)
In the present embodiment, a method for reconfiguring a parity group according to performance requirements specified by the administrator of the virtual storage apparatus 106 will be described.

  Hereinafter, a difference between the fifth embodiment and the first, second, and third embodiments will be described.

  FIG. 48 is a diagram showing a partial data structure of the virtual storage configuration information 205.

  48 differs from the virtual storage configuration information 801 of FIG. 8 in 4813 and 4814.

  Items of physical disk performance requirement 4813 and RAID level performance requirement 4814 are added to the virtual storage configuration information 701 described in the first embodiment.

  The administrator of the virtual storage apparatus 106 inputs performance requirements from the GUI screen 3102 of the management server 102. Then, the management server 102 transmits the performance requirement to the physical storage device 120. Then, the control processor 124 of the physical storage device 120 inputs the physical disk performance requirement 4813 and the RAID level performance requirement 4814 into the virtual storage configuration information 701.

  The control processor 124 inputs the number of rotations of the hard disk such as “1.5 krpm” into the physical disk performance requirement 4813. Further, the control processor 124 may input a hard disk access speed such as “60 MB / s” or “30 IOPS” in the physical disk performance requirement 4813.

  The control processor 124 inputs a RAID level such as “RAID1”, “RAID5”, “RAID6” or the like into the RAID level performance requirement 4814.

  FIG. 49 is a diagram showing the data structure of the physical disk control information 905.

  FIG. 49 is different from FIG. 12 in 4913.

  The control processor 124 inputs the number of rotations of the hard disk such as “1 krpm” into the physical disk performance 4913. Further, the control processor 124 may input a hard disk access speed such as “60 MB / s” or “30 IOPS” in the physical disk performance 4913.

  The control processor 124 may input the physical disk performance 4913 from the physical disk model number, or the administrator may input the physical disk performance 4913 of each physical disk from the management server 102.

  FIG. 50 (FIG. 50 (a) and FIG. 50 (b)) is a flowchart showing the resource preparation process.

  50 is different from FIG. 38 in 5001 to 5006 and 5008 to 5013.

  In other processes related to the resource preparation process, the description of the same parts as those in the first embodiment, the second embodiment, and the third embodiment is omitted.

  A free resource is searched for one necessary resource among the resource requirements obtained in step 1101, and a free resource list is created (step 5001). Specifically, the control processor 124 refers to the usage state of information corresponding to a necessary resource among the resource volume control information 901, the resource cache memory control information 902, and the resource task control information 903. Then, the control processor 124 creates a free resource list for “unused” resources. For example, if the necessary resource is a volume, the control processor 124 refers to the usage status 1024 of the resource volume control information 901 and creates a list of “unused” resources.

  Next, the control processor 124 checks whether there is a free resource from the free resource list created in step 5001. If there is no free resource (N in Step 5002), a warning message is displayed (Step 1108). If there is a free resource (Y in step 5002), the control processor 124 searches the free resource list for a resource that satisfies the performance requirement (step 5003).

  Hereinafter, the processing of step 5003 will be specifically described. The value of the physical disk performance requirement 4813 of the virtual storage configuration information 4801 is compared with the value of the physical disk performance 4913 in the physical disk control information 4901 of the physical disk corresponding to the resource of each element of the free resource list. When the value of the physical disk performance requirement 4813 of the virtual storage configuration information 4801 is the same as or exceeds the value of the physical disk performance 4913, the physical disk performance requirement 4813 of the resource is satisfied.

  Further, the contents of the RAID level performance requirement 4814 of the virtual storage configuration information 4801 are compared with the contents of the RAID level 1113 in the parity group control information 904 of the parity group corresponding to the resource of each element of the free resource list. If the contents of the RAID level performance requirement 4814 and the RAID level 1113 corresponding to the free resource list are the same, the RAID level performance requirement 4814 of the resource is satisfied. When resources having the same contents are not in the free resource list, the RAID level performance requirement 4814 is satisfied as follows. Only when a resource belonging to a parity group not used by another virtual storage apparatus 106 is in the free resource list, the RAID level of the parity group to which the resource belongs is changed. As described above, in step 5003, the control processor 124 checks whether there is a resource that satisfies the two requirements of the physical disk performance requirement 4813 and the RAID level performance requirement 4814 from the list of free resources created in step 5001. .

  The above is the description of the processing in step 5003.

  Next, the control processor 124 checks whether there are resources that satisfy the requirement (step 5004). When the control processor 124 determines in step 5003 that both of the physical disk performance requirement 4813 and the RAID level performance requirement 4814 are not satisfied (N in step 5004), the performance warning message is displayed on the GUI screen 3102 of the management server 102. (Step 5008). Details of the performance warning message will be described with reference to FIG.

  When the control processor 124 determines in step 5003 that there is a resource that satisfies the physical disk performance requirement 4813 (Y in step 5004), the control processor 124 checks whether a configuration change is necessary (step 5005). In step 5003, the control processor 124 compares the contents of the RAID level 1113 of the parity group control information 904. If resources having the same contents do not exist, the control processor 124 determines in step 5005 that a configuration change is necessary (Y in step 5005), and checks whether the parity group can be changed (step 5011).

  In step 5003, if a resource belonging to a parity group that is not used by another virtual storage device 106 is not in the free resource list, the control processor 124 determines that the parity group cannot be changed (N in step 5011). In this case, a configuration change impossible message is displayed on the GUI screen 3102 of the management server 102 (step 5012).

  After the configuration change impossible message is displayed in step 5012, the administrator of the virtual storage apparatus 106 designates “resume required” or “cancel” from the GUI screen 3102 of the management server 102 (step 5013). When the administrator of the virtual storage apparatus 106 specifies “resume required” (Y in step 5013), if the control processor 124 determines in step 5004 that there is a resource that satisfies the performance, the resource satisfies the performance. If it is determined that there are no resources, an arbitrary resource in the free resource list is added to the prepared resource list (step 5010). When the administrator of the virtual storage apparatus 106 designates “Cancel” (N in Step 5013), the control processor 124 ends the resource preparation process and interrupts the resume process.

  In step 5003, if a resource belonging to a parity group that is not used by another virtual storage device 106 is in the free resource list, it is determined that the parity group can be changed (N in step 5011). Parity group change processing 5006 is executed.

  The parity group change process 5006 is a process for changing the configuration of the parity group to which the resource belongs to the RAID level of the RAID level performance requirement 4814. In step 5003, it is confirmed that there is no virtual storage device 106 that uses the parity group. Therefore, even if the configuration is changed, the other virtual storage devices 106 are not affected. In the parity group change processing 5006, the control processor 124 changes the RAID level of the parity group, and then generates a new resource volume using the parity group. At that time, the control processor 124 updates the RAID level 1113 of the parity group control information 904. Further, the control processor 124 changes the resource volume control information 901 when the size of the parity group changes after changing the RAID level.

  When the parity group change processing 5006 is completed, the resource volume is added to the resource preparation list (step 5010).

  If the control processor 124 determines in step 5003 that there is a free resource satisfying the physical disk performance requirement, the processing is executed from step 5005.

  After the performance warning message is displayed in step 5008, if the administrator of the virtual storage apparatus 106 designates “resume required” from the GUI screen 3102 of the management server 102 (Y in step 5009), the process proceeds from step 5005. When the administrator of the virtual storage apparatus designates “cancel” from the GUI screen 3102 of the management server 102 (N in Step 5009), the control processor 124 ends the resource preparation process and interrupts the resume process.

  When resources are added to the prepared resource list in step 5010, if a series of processing (steps 5001 to 5010) has not been performed for all necessary resources obtained in step 1101 (N in step 1109), the following A search for free resources is performed for necessary resources (step 5001). If a series of processes have been performed for all necessary resources (Y in step 1109), the control processor 124 executes a resource securing process (step 3811) and ends.

  FIG. 51 is a diagram illustrating a GUI screen 3102 of the management server 102.

  51 is different from FIG. 31 in 5101 to 5103 and 5111 to 5116.

  The GUI screen 3102 of the management server 102 includes a required performance designation screen 5101. The administrator of the virtual storage apparatus 106 specifies the physical disk performance 5102 and the RAID level 5103 on the required performance specification screen 5101.

  The administrator of the virtual storage apparatus 106 designates the number of rotations of the hard disk, such as “1.5 krpm”, for the physical disk performance 5102. Further, the access speed of the hard disk such as “60 MB / s” or “30 IOPS” may be input to the physical disk performance 5102.

  The administrator of the virtual storage apparatus 106 designates a RAID level such as “RAID1”, “RAID5”, “RAID6” or the like as the RAID level 5103.

  When the administrator of the virtual storage apparatus 106 inputs the requested performance designation screen 5101 and presses the execute button 3116, the management server 102 sets the physical disk performance 5102 set in the required performance designation screen 5101 on the physical storage apparatus 120 and the RAID level. The setting content 5103 is transmitted.

  In step 5008, the physical storage device 120 sends an instruction to display the performance warning message 5111 on the management server 102 when the setting contents of the physical disk performance 5102 specified by the administrator of the virtual storage device 106 cannot be satisfied. To do.

  When the continuation button 5113 is pressed, the management server 102 transmits a message informing the physical storage device 120 that resume will be continued. Then, the physical storage device 120 determines that resumption is necessary in Step 5009 (Y in Step 5009). When a cancel button 5114 is pressed, the management server 102 transmits a message notifying the physical storage device 120 that the resume is cancelled. Then, the physical storage device 120 determines in step 5009 that resuming is unnecessary (N in step 5009).

  In step 5012, the physical storage device 120 sends an instruction to display the configuration change impossible message 5112 on the management server 102 when the setting contents of the RAID level 5103 specified by the administrator of the virtual storage device 106 cannot be satisfied. To do.

  When the continuation button 5115 is pressed, the management server 102 transmits a message informing the physical storage device 120 that resume will be continued. Then, the physical storage device 120 determines that resumption is necessary in step 5013 (Y in step 5013). When a cancel button 5116 is pressed, the management server 102 transmits a message notifying the physical storage device 120 that cancellation of resume is to be performed. Then, the physical storage device 120 determines in step 5013 that resuming is unnecessary (N in step 5013).

As described above, the physical resources allocated by the physical storage 120 to the virtual storage apparatus 106A before being suspended cannot be allocated when the virtual storage apparatus 106A is resumed because the other virtual storage apparatus 106B is using the physical resource. Even in such a case, by searching for a free resource satisfying the performance requirement in step 5003 at the time of resuming, and generating a resource satisfying the required performance by the parity group change processing in step 5006 and resuming using the resource. , Performance degradation can be avoided. Even if a resource that satisfies the performance requirements cannot be generated in step 5006, the management server can notify the administrator of the virtual storage apparatus 106 by displaying the performance warning message 5111 or the configuration change impossible message 5112. Measures such as adding new physical disks can be encouraged.
(Sixth embodiment)
In this embodiment, a method for preventing a resource from being resumed due to insufficient resources during resumption by reserving resources when the virtual storage device 106 is suspended will be described. This embodiment can be applied to the first to fourth embodiments.

  Hereinafter, the difference between the sixth embodiment and the first embodiment will be described.

  FIG. 56 is a view showing a GUI screen 2202 of the management server 102.

  52 is different from FIG. 31 in 5201 to 5204.

  When reserving a resource, the administrator of the virtual storage apparatus 106 sets the resource reservation 5201 on the suspend setting screen 3111 to “present”. The administrator of the virtual storage apparatus 106 sets the resource reservation 5201 to “none” when not reserving the resource.

  When the virtual storage apparatus 106 is resumed, the GUI screen 3102 of the management server 102 displays a warning message 5202 if the resource cannot be resumed. When the reservation cancel button 5203 of the warning message 5202 is pressed, the resource specified for reservation is released. The purpose of releasing the reserved resource is that when the virtual storage device 106 cannot resume because there is no free resource, the virtual storage device 106 can be resumed urgently by releasing the resource reservation. It is to be. Detailed operations on the physical storage device side will be described later with reference to FIG.

  FIG. 53 is a diagram showing a data structure of resource reservation information.

  The resource reservation information 5301 includes, as items, a resource type 5311, a resource number 5312, presence / absence of reservation 5313, a virtual storage device number 5314, and a virtual resource number 5315. Resource reservation information 5301 is stored in the control memory 125.

  The control processor 124 inputs a resource type such as “resource task” and “resource volume” in the resource type 5311.

  The control processor 124 inputs the resource number into the resource number 5312. In the presence / absence of reservation 5313, the control processor 124 inputs “Yes” if the resource with the resource number 5312 is reserved, and “No” if not reserved.

  When the presence / absence of reservation 5313 is “present”, the control processor 124 inputs the number of the reserved virtual storage device 106 in the virtual storage device number 5314.

  When the presence / absence of reservation 5313 is “present”, the control processor 124 sets the virtual resource number 5315 to the resource with the resource number 5312 of the reserved virtual storage device 106 and the virtual resource number corresponding to before the suspension. Enter.

  FIG. 54 is a flowchart showing a suspend process when a resource reservation is specified.

  When the administrator of the virtual storage apparatus 106 sets the resource reservation 5201 to “present” on the GUI screen 3102 of the management server 102 and instructs suspension, the physical storage apparatus 120 first updates the resource reservation information ( Step 5401). Specifically, for each resource used by the virtual storage device 106 to be suspended, the control processor 124 refers to the virtual storage resource management information 211 and stores the resource type 5311, resource number 5312, Numbers corresponding to the virtual storage device number 5314 and the virtual resource number 5315 are input, and “present” is input to the reservation presence / absence 5313.

  Thereafter, a suspend process 311 is executed (step 5402).

  FIG. 55 is a flowchart showing the resource preparation process at the time of resuming.

  FIG. 55 is different from FIG. 30 in 5501-5504. Regarding the necessary resource requirements obtained in step 3001, the control processor 124 checks whether there is a reserved resource in the resume target virtual storage device (step 5501). Specifically, the control processor 124 refers to the resource reservation information 5301 and checks whether there is a resource having the number of the virtual storage apparatus 106 to be resumed and the presence / absence of reservation 5313 being “present”.

  If there is a reserved resource (Y in step 5501), the control processor 124 inputs “None” in the reservation presence / absence 5313 of the resource reservation information 5301 for the resource. Then, the control processor 124 updates the virtual storage resource management information 211 and the physical storage control information 210 corresponding to the resource to be secured, with the resource as a securing target (step 3004). In the subsequent processing, the description of the same parts as those in the first embodiment is omitted.

  If there is no reserved resource in Step 5501 (N in Step 5501), a free resource is searched (Step 3002), and the process proceeds to Step 3003.

  If it is determined in step 3003 that there are no free resources (N in 3003), a warning message is displayed (step 3008). Specifically, in step 3008, the physical storage device 120 transmits a command to display a warning message to the management server 102. The management server 102 receives this by the storage management program and displays a warning message 5202.

  When the administrator of the virtual storage apparatus 106 presses the reservation cancellation button 5203 of the warning message 5202, a reservation cancellation command is transmitted from the management server 102 to the physical storage apparatus 120. Then, the physical storage device 120 determines to cancel the reservation (Y in Step 5503), and executes the reservation cancellation (Step 5504). Specifically, in step 5504, the control processor 124 sets all the reservations 5313 in the resource reservation information 5301 to “None”. Thereafter, the process returns to step 3002 to search for a free resource from the beginning again.

  When the administrator of the virtual storage apparatus 106 presses an OK button 5204 in the warning message 5202, a command not to execute reservation cancellation is transmitted from the management server 102 to the physical storage apparatus 120. Then, the physical storage device 120 determines not to cancel the reservation (N in Step 5505), ends the resource preparation process, and interrupts the resume process.

  If it is determined in step 3003 that there is a free resource (N in 3003), the physical storage device 120 checks whether the resource has been reserved for the free resource (step 5502). Specifically, the control processor 124 refers to the resource reservation information 5301 corresponding to the number of the free resource, and when the presence / absence of reservation 5313 is “present”, the control processor 124 determines that the resource has been reserved (Y in step 5502). . Then, the control processor 124 proceeds to Step 3002 to search for another free resource. If the reservation presence / absence 5313 is “none”, the control processor 124 determines that the resource is not reserved (N in Step 5502), and proceeds to Step 3004. In the subsequent processing, the description of the same parts as those in the first embodiment is omitted.

The above processing is summarized. The administrator of the virtual storage apparatus 1201A designates resource reservation from the GUI screen 3102 of the management server 102. Then, the physical storage device 120 updates the resource reservation information 5301 in step 5401 when the virtual storage device 1201A is suspended. Then, the physical storage device 120 checks whether there is a reservation in step 5502 of the resource preparation process when another virtual storage device 1201C (not disclosed) resumes. Then, the physical storage device 120 secures only unreserved resources. In this way, the virtual storage apparatus 1201A can be prevented from being unable to resume due to insufficient resources.
(Seventh embodiment)
In this embodiment, a method for shortening the execution time of suspend and resume processing by allowing the administrator of the virtual storage apparatus 106 to select whether or not to save volume data when the virtual storage apparatus 106 is suspended will be described.

  This embodiment can be applied to the first to fourth embodiments.

  Hereinafter, the difference between the seventh embodiment and the first and sixth embodiments will be described.

  FIG. 56 is a diagram showing a screen 3101 of the management server 102.

  56 differs from FIG. 31 in FIG.

  The administrator of the virtual storage apparatus 106 inputs “Yes” in the volume data save 5601 when saving the volume data, and “No” if not saved.

  When saving the volume data, the physical storage device 120 copies the volume data to a volume different from the current one (such as the external storage device 129). For this reason, it takes a long time to save the volume data. If the volume data is not saved, the execution time can be shortened. However, if not saved, data remains in the resource volume and cannot be released. For this reason, other virtual storage apparatuses cannot use the resource volume. Therefore, the administrator decides which one to select because of restrictions on the restart time of the system.

  FIG. 57 is a flowchart showing the volume saving designation process.

  The control processor 124 of the physical storage device 120 executes volume save designation processing.

  Only when the administrator of the virtual storage apparatus 106 sets “exist” to the volume data save 5601 on the GUI screen 3102 of the management server 102, the volume save designation process is executed. At this time, the management server 102 communicates with the physical storage device 120 by the storage management program 1704 and instructs the storage device 120 to execute the volume saving designation process.

  When starting the volume evacuation designation process, the control processor 124 changes the volume evacuation information 5802 and designates the virtual volume without evacuation (step 5701). Specifically, the control processor 124 inputs “None” in the presence / absence of saving 6212 corresponding to the virtual volume number used by the virtual storage device 106 to be suspended in the volume saving information 5802.

  Next, the control processor 124 changes the resource reservation information 5301 (related to the sixth embodiment) and reserves the virtual volume (step 5702). Specifically, the control processor 124 refers to the virtual storage resource management information 1521, inputs the resource type 5311, the resource number 5312, the virtual storage device number 5314, and the virtual resource number 5315 to the resource reservation information 5301, “Present” is entered in the presence / absence 5313.

  Regarding the reservation, in the description of the sixth embodiment, it has been described that the reservation cancellation can be executed in step 5505. However, in this embodiment, the volume data is not saved to another volume. For this reason, if reservation cancellation is executed when another virtual storage device 106 is resumed and the resource volume is used, data may be destroyed. If the data is destroyed, it cannot be restored. Therefore, during execution of step 5702, the control processor 124 sets “No” for the virtual volume of the virtual storage device 106 to be suspended in the reservation cancelability information 6001. As a result, the control processor 124 checks the reservation cancellation availability information 6001 in step 6301 of the resource preparation process described later to prevent execution of the reservation cancellation of the virtual volume.

  Next, it is determined whether or not the processing has been executed for all virtual volumes used by the virtual storage device 106 to be suspended. (Step 5703) If the process has not been executed (N in Step 5703), the process proceeds from Step 5701 for the next virtual volume. If it has been executed (Y in Step 5703), the process ends.

  FIG. 58 is a diagram illustrating information held in the virtual storage control information.

  58 differs from the virtual storage control information 201 portion of FIG. 4 in 5802 and 6001.

  Virtual storage configuration information 5801, volume save information 5802, and reservation release enable / disable information 6001 are added to the virtual storage control information 401 described in the first embodiment. The volume evacuation information 5802 and the reservation cancelability information 6001 will be described later.

  FIG. 59 shows the data structure of volume save information.

  The volume save information 5802 includes a virtual volume number 5911 and save status 5912 as items.

  Whether or not the virtual volume corresponding to the virtual volume number 5911 executes the evacuation when the virtual storage apparatus 106 to which the virtual volume belongs is suspended is indicated by the presence / absence 5912 of the evacuation. The control processor 124 inputs “Yes” if the save is to be executed, and “No” if it is not to be executed, as the save status 5912 of the volume save information 5802.

  FIG. 60 is a diagram showing a data structure of reservation cancellation availability information.

  The volume evacuation information 6001 includes a virtual volume number 6011 and reservation cancelability 6012 as items.

  Whether or not reservation cancellation is executed when the virtual volume corresponding to the virtual volume number 6011 is resumed by the virtual storage apparatus 106 indicates whether or not reservation cancellation 6012 is performed. The control processor 124 inputs “permitted” in the reservation cancellation permission / inhibition 6012 of the volume evacuation information 6001 when executing the reservation cancellation, and “not permission” when not executing the reservation cancellation.

  FIG. 61 is a flowchart showing the operation of the suspend process.

  FIG. 61 is different from FIG. 27 in 6101 and 6102.

  After step 2703, it is determined whether there is volume saving (step 6101). Specifically, the control processor 124 refers to the virtual storage resource management information 1521 and the volume save information 5802 when the target resource is a resource volume. Then, the control processor 124 determines whether or not the virtual volume number corresponding to the target resource volume and the saving status 5912 of the volume saving information 5802 corresponding to the virtual volume number are “present”. If it is “Yes” (Y in Step 6101), the physical storage device 120 saves the volume data to the storage image data storage destination volume (Step 6102). On completion of step 6102, control proceeds to step 2705.

  On the other hand, if the presence / absence of the saving 6212 is “None” (N in Step 6101), the process proceeds to Step 2705.

  FIG. 62 is a flowchart showing the resume processing operation of the virtual storage apparatus 106.

  62 differs from FIG. 29 in 6201-6203.

  After step 2902, the control processor 124 determines whether there is volume saving (step 6201). Specifically, the control processor 124 refers to the virtual storage resource management information 1521 and the volume save information 5802 when the target resource is a resource volume. Then, the control processor 124 determines whether or not the virtual volume number corresponding to the target resource volume and the saving status 5912 of the volume saving information 5802 corresponding to the virtual volume number are “present”. If the presence / absence of saving 5912 is “present” (Y in step 6201), the volume data is recovered from the storage image data 1601 (step 6202). Then, after step 6202 ends, the process proceeds to step 6203.

  If the presence / absence of the save 5912 is “None” (N in Step 6201), the process proceeds to Step 6203.

  The control processor 124 determines whether or not all the resource volumes have been executed (step 6203). If it has been executed (Y in step 6203), the control processor 124 proceeds to step 2904. If not executed (N in Step 6203), the control processor 124 proceeds with the process from Step 6201 for the next resource volume.

  FIG. 63 is a flowchart showing the operation of the resource preparation process.

  FIG. 63 differs from FIG. 55 in that step 6301 is added.

  In step 5504, the control processor 124 of the physical storage device 120 displays a warning message, and then determines whether the target virtual volume can be released from the reservation (step 6301). Specifically, the control processor 124 checks whether or not the reservation cancellation availability information 6001 corresponding to the target virtual volume is “No”. If “No”, the control processor 124 ends without executing the reservation cancellation (N in Step 6301). ). If the reservation cancelability information 6001 is “permitted” (Y in step 6301), the process proceeds to step 5505.

  The processing of Example 7 is summarized. When the virtual storage apparatus 106 is suspended, the volume save information 5802 is changed in step 5701. The resource volume used by the virtual storage apparatus 106 is designated as not being subject to data backup. In step 6101 and step 6201, it is determined whether or not to execute processing for saving volume data as storage image data 1601 to another volume. In this way, when the data is not to be saved, the suspend process and the resume process can be executed at high speed by not performing the data save.

In addition, the reservation cancellation availability information 6001 can be changed, and the reservation cancellation of the virtual volume can be invalidated in Step 5702. In this case, when the other virtual storage apparatus 106 is resumed, it is possible to prevent overwriting the resource volume and destroying the data in step 6301.
(Eighth embodiment)
In this embodiment, a process for checking a license of a program when the physical storage device suspended by the virtual storage device 106 and the physical storage device 120 to be resumed are different will be described.

  This embodiment is applied to the fourth embodiment.

  Hereinafter, the difference between the eighth embodiment and the first and fourth embodiments will be described.

  FIG. 64 is a warning message indicating that the program license is not installed at the time of resumption. This warning message is displayed when the license of the program installed on the physical storage device 120 that has suspended the virtual storage device 106 is not installed on another physical storage device 120 that is the resume destination. Is displayed.

  The message displays, for example, the message “There is no license for the following program in the resume storage. Please install the program.” And the type of the program that has not been installed (for example, “Remote Copy”). .

  FIG. 65 is a diagram showing information held in the physical storage control information.

  65 differs from FIG. 9 in that 6601 is added.

  In this embodiment, program license information 6601 is added to the physical storage control information described in the first embodiment.

  FIG. 66 shows the data structure of program license information 6601.

  The control processor 124 inputs a program type such as “local copy” or “remote copy” in the program type 6611 in the program license information 6601, and inputs whether the license corresponding to the program type is valid or invalid in the license information 6612. To do.

  When license installation is executed from the GUI screen 3102 of the management server 102, the management server 102 communicates with the physical storage. Then, the control processor 124 sets the license information 6612 of the program type 6611 corresponding to the program license information to “valid”. When the license is uninstalled from the GUI screen 3102 of the management server 102, the management server 102 communicates with the physical storage. Then, the control processor 124 invalidates the license information 6612 of the program type 6611 corresponding to the program license information.

  FIG. 67 is a flowchart showing the operation of the resume process.

  67 differs from FIG. 29 in that 6701 and 6702 are added.

  After step 2901, the control processor 124 checks whether the program license is valid (step 6701). Specifically, after step 2901, the control processor 124 confirms the program type 714 for the program control information 402 read into the control memory from the storage destination volume of the storage image data 1601. Then, the control processor 124 checks whether or not the license information 6612 corresponding to the program type 6611 of the program license information 6601 is “valid” for each program type existing in the program type 714. If there is even one invalid program type (N in step 6701), the physical storage device 120 transmits the invalid program type to the management server 102. Then, a warning message is displayed and displayed together with the invalid program type on the GUI screen 3102 of the management server 102 (step 6702), and the process ends. If there is no invalid program type in step 6701 (Y in step 6701), the process proceeds to step 2902.

Summarize the above. The control processor 124 determines whether or not the program is installed by checking whether or not the license of the program is valid in step 6701. If the program is not installed, the GUI screen 3102 of the management server 102 notifies the administrator of the virtual storage apparatus 106 of the program that is not installed. In this way, the administrator can quickly know the cause of the inability to resume.
(Ninth embodiment)
In the present embodiment, a method of automatically suspending the virtual storage apparatus 106 when there is no host command command from the host for a certain period of time will be described.

  This embodiment is applied to the first to fourth embodiments.

  Hereinafter, the difference between the ninth embodiment and the first embodiment will be described.

  FIG. 68 shows the data structure of the automatic suspend information 6801.

  The automatic suspend information 6801 includes a virtual volume number 6811, a last command reception time 6812, and a threshold 6813.

  The virtual volume number 6811 is a number uniquely assigned to each virtual storage apparatus 106.

  The last command reception time 6812 is the last time that the virtual volume received the host command. Input by the control processor 124.

  The threshold value 6813 is a time from when the host command is last received until the suspension is automatically performed. The administrator of the virtual storage device 106 inputs on the GUI screen 3101 of the management server 102.

  FIG. 69 is a flowchart showing the operation of the host command processing 423.

  FIG. 69 differs from FIG. 26 in steps 6901 to 6903.

  In step 2602, the physical storage device 120 calculates a virtual storage device number corresponding to the port.

  Next, the physical storage device determines whether the virtual storage device 106 is in the suspended state (step 6901). When the virtual storage device 106 is in the suspended state (Y in Step 6901), the physical storage device 120 performs the resume process of the virtual storage device 106 (Step 6902). Then, the process proceeds to step 2603. If the virtual storage apparatus 106 is not in the suspended state (N in step 6901), the process proceeds to step 2603.

  Next, the physical storage device 120 calculates a task from the virtual control unit corresponding to the virtual storage device 106 (step 2603).

  Next, the physical storage device updates the last command reception time. Specifically, the control processor 124 refers to the automatic suspend information 6801. Then, the control processor 124 inputs the time at which the host command is received as the final command reception time 6812 corresponding to the virtual volume number 6811 of the virtual volume that has received the host command.

  Since the following processing is the same as the processing in FIG. 26, description thereof is omitted.

  FIG. 70 is a flowchart when the virtual storage apparatus 106 is automatically suspended when there is no host command command from the host for a certain period of time.

  Steps 7002 to 7005 are periodically executed (step 7001). When a certain time has elapsed, the processing in step 7002 is started.

  Next, the physical storage device 120 checks the last command reception time 6812 (step 7002). Specifically, the control processor 124 refers to the automatic suspend information 6801 and checks the final command reception time 6812.

  Next, the control processor 124 refers to the automatic suspend information 6801 and determines whether or not a time period equal to or greater than the threshold value 6813 has elapsed (step 7003).

  When the time has elapsed beyond the threshold 6813 (Y in Step 7003), the suspend process of the virtual storage device 106 is executed. If the threshold time 6813 or more has not elapsed (N in Step 7003), the process proceeds to Step 7005.

  When the processing is executed for all the virtual storage apparatuses 106 (Y in Step 7005), the processing in Step 7001 is executed again. If the processing has not been executed for all the virtual storage devices 106 (N in Step 7005), the processing in Step 7002 is executed for the other virtual storage devices 106.

  FIG. 71 shows a GUI screen 3101 of the management server 102.

  71 differs from FIG. 31 in an automatic suspend presence / absence input screen 7101 and a suspend threshold input screen 7102.

  The administrator of the virtual storage apparatus 106 inputs “Yes” if the suspend process is automatically performed, and “No” if not.

  In addition, the administrator of the virtual storage apparatus 106 inputs a suspend threshold.

It is a figure which shows the apparatus structure which concerns on the 1st Embodiment of this invention. It is a figure which shows the virtual storage apparatus which concerns on the 1st Embodiment of this invention. It is a figure which shows the mapping from the physical resource which concerns on the 1st Embodiment of this invention to a resource, and a resource to virtual storage. It is a figure which shows the control part which concerns on the 1st Embodiment of this invention. It is a figure which shows the LUN security information which concerns on the 1st Embodiment of this invention. It is a figure which shows LUN mapping information which concerns on the 1st Embodiment of this invention. It is a figure which shows the program control information which concerns on the 1st Embodiment of this invention. It is a figure which shows the virtual storage structure information which concerns on the 1st Embodiment of this invention. It is a figure which shows the physical storage control information which concerns on the 1st Embodiment of this invention. It is a figure which shows the resource volume control information which concerns on the 1st Embodiment of this invention. It is a figure which shows the parity group control information which concerns on the 1st Embodiment of this invention. It is a figure which shows the physical disk control information which concerns on the 1st Embodiment of this invention. It is a figure which shows the resource cache memory control information which concerns on the 1st Embodiment of this invention. It is a figure which shows the resource task control information which concerns on the 1st Embodiment of this invention. It is a figure which shows the virtual storage resource management information which concerns on the 1st Embodiment of this invention. It is a figure which shows the storage image data based on the 1st Embodiment of this invention. It is a figure which shows the memory which concerns on the 1st Embodiment of this invention. It is a figure which shows the WWN information which concerns on the 1st Embodiment of this invention. It is a figure which shows the structure by the side of the host which concerns on the 1st Embodiment of this invention. It is a figure which shows the whole work resumption which concerns on the 1st Embodiment of this invention. It is a figure which shows the operation | movement flow by the side of the host which concerns on the 1st Embodiment of this invention. It is a figure which shows the WWN change notification program which concerns on the 1st Embodiment of this invention. It is a figure which shows the WWN change notification packet which concerns on the 1st Embodiment of this invention. It is a figure which shows the WWN change notification reception process which concerns on the 1st Embodiment of this invention. It is a figure which shows the WWN change notification information which concerns on the 1st Embodiment of this invention. It is a figure which shows the host command process which concerns on the 1st Embodiment of this invention. It is a figure which shows the suspension of the virtual storage which concerns on the 1st Embodiment of this invention. It is a figure which shows the resource release process which concerns on the 1st Embodiment of this invention. It is a figure which shows resumption of the virtual storage which concerns on the 1st Embodiment of this invention. It is a figure which shows the resource preparation process which concerns on the 1st Embodiment of this invention. It is a figure which shows GUI of the management server which concerns on the 1st Embodiment of this invention. It is a figure which shows the power supply boundary of the storage apparatus which concerns on the 2nd Embodiment of this invention. It is a figure which shows the package resource corresponding | compatible information which concerns on the 2nd Embodiment of this invention. It is a figure which shows the resource release process which concerns on the 2nd Embodiment of this invention. It is a figure which shows the resource preparation process which concerns on the 2nd Embodiment of this invention. It is a figure which shows the module type storage apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows the module information which concerns on the 3rd Embodiment of this invention. It is a figure which shows the resource preparation process which concerns on the 3rd Embodiment of this invention. It is a figure which shows the requirement check process in a module which concerns on the 3rd Embodiment of this invention. It is a figure which shows the requirement check process in a physical storage apparatus which concerns on the 3rd Embodiment of this invention. It is a figure which shows the resource securing process which concerns on the 3rd Embodiment of this invention. It is a figure which shows GUI of the management server which concerns on the 3rd Embodiment of this invention. It is a figure which shows the manual setting screen which concerns on the 3rd Embodiment of this invention. It is a figure which shows the preparation resource list | wrist which concerns on the 3rd Embodiment of this invention. It is a figure which shows the resume between storage apparatuses which concerns on the 4th Embodiment of this invention. It is a figure which shows the whole work resumption which concerns on the 4th Embodiment of this invention. It is a figure which shows GUI of the management server which concerns on the 4th Embodiment of this invention. It is a figure which shows the virtual storage structure information which concerns on the 5th Embodiment of this invention. It is a figure which shows the physical disk control information based on the 5th Embodiment of this invention. It is a figure which shows the resource preparation process which concerns on the 5th Embodiment of this invention. It is a figure which shows the resource preparation process which concerns on the 5th Embodiment of this invention. It is a figure which shows the requirement input screen (GUI) which concerns on the 5th Embodiment of this invention. It is a figure which shows GUI of the management server which concerns on the 6th Embodiment of this invention. It is a figure which shows the resource reservation information which concerns on the 6th Embodiment of this invention. It is a figure which shows the suspend process at the time of the resource reservation designation | designated which concerns on the 6th Embodiment of this invention. It is a figure which shows the resource preparation process which concerns on the 6th Embodiment of this invention. It is a figure which shows GUI of the management server which concerns on the 7th Embodiment of this invention. It is a figure which shows the volume evacuation designation | designated process which concerns on the 7th Embodiment of this invention. It is a figure which shows the virtual storage control information which concerns on the 7th Embodiment of this invention. It is a figure which shows the volume saving information which concerns on the 7th Embodiment of this invention. It is a figure which shows the reservation cancellation | release availability information which concerns on the 7th Embodiment of this invention. It is a figure which shows the suspension of the virtual storage which concerns on the 7th Embodiment of this invention. It is a figure which shows resumption of the virtual storage which concerns on the 7th Embodiment of this invention. It is a figure which shows the resource preparation process which concerns on the 7th Embodiment of this invention. It is a figure which shows the license warning screen (GUI) which concerns on the 8th Embodiment of this invention. It is a figure which shows the physical storage control information which concerns on the 8th Embodiment of this invention. It is a figure which shows the program license information which concerns on the 8th Embodiment of this invention. It is a figure which shows the process which checks a program license at the time of resuming which concerns on the 8th Embodiment of this invention. It is a figure which shows the host command process which concerns on the 9th Embodiment of this invention. It is a figure which shows the periodic suspend check process which concerns on the 9th Embodiment of this invention. It is a figure which shows the automatic suspend information which concerns on the 9th Embodiment of this invention. It is a figure which shows GUI of the management server which concerns on the 9th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Host group, 102 ... Management server, 103 ... Host, 104 ... Port, 105 ... Network, 119 ... Network, 120 ... Physical storage apparatus, 121 ... Management I / F, 122 ... Port, 123 ... Control part, 124 ... Control processor, 125 ... Control memory, 126 ... Cache memory, 127 ... Physical drive, 128 ... Port, 129 ... Physical storage device (external connection), 130 ... Slot

Claims (25)

A storage device connected to at least one computer and an external storage device,
A plurality of storage devices for storing data; a plurality of cache memories; and a plurality of processors for processing input / output requests from the at least one computer by at least one of a plurality of tasks,
One of the plurality of processors allocates at least one of the plurality of storage devices, at least one of the plurality of cache memories, and at least one of the plurality of tasks to a virtual storage device,
The virtual storage device processes an input / output request from the at least one computer,
The processor receives a suspend instruction for the virtual storage device from a computer, and controls the storage device, the cache memory, the task, control information for managing the correspondence relationship of the virtual storage device, and the data. A storage apparatus that stores in the external storage apparatus and releases the allocation of the storage apparatus, the cache memory, and the task. One of the plurality of processors stores the data and the control information in the external storage device, and then powers off the external storage device,
After deallocating the storage device, the cache memory, and the task,
The storage device, the cache memory, and the processor that are assigned to the virtual storage device to be powered off are assigned to virtual storage devices other than the virtual storage device to be powered off. The storage apparatus according to claim 1, wherein if there is not, the storage apparatus, the cache memory, and the processor are powered off. One of the plurality of processors receives a resume instruction for the virtual storage device from a computer, and when the external storage device is powered off, turns on the external storage device,
If the processor is powered off, turn on the processor, the processor reads the data and the control information stored in the external storage device,
If an unused storage device or cache memory is turned off, turn it on,
The storage device according to claim 2, wherein the storage device, the cache memory, and the task are allocated to the virtual storage device. If the external storage device is powered off, turn on the external storage device,
If the processor is powered off, turn on the processor,
The processor reads the data and the control information stored in the external storage device, and allocates a storage device, a cache memory, and a task of a storage device different from the storage device before the allocation release to the virtual storage device. Item 3. The storage device according to Item 2. The processor includes identification information of the computer, change information of the identification information of the computer, and key information, and updates the previous period change information when it matches the key information received from the computer. Storage device. When the processor allocates the storage device, the cache memory, and the task to the virtual storage device, the processor determines whether the identification information has been changed by the change information. The storage apparatus according to claim 5, which is updated. In response to the performance request of the virtual storage device sent from the computer, the processor searches for an unused storage device, cache memory, and task that satisfies the request, and responds to the request. The storage apparatus according to claim 1, wherein the parity group is changed. The package includes at least one of the plurality of storage devices, at least one of the plurality of cache memories, or at least one of the plurality of processors,
After the allocation of the storage device or the cache memory or the plurality of processors in the package to the plurality of virtual storage devices is released,
The power supply of the package is turned off when the package assigned to the virtual storage device to be turned off is not assigned to a virtual storage device other than the virtual storage device to be turned off. The storage device according to 1. The storage device includes a plurality of modules, and the module includes a package including at least one of the plurality of storage devices, at least one of the plurality of cache memories, or at least one of the plurality of processors. If the external storage device is turned off, turn on the external storage device, and if the processor is turned off, turn on the processor, and the processor stores the data in the external storage device. Data and the control information are read, and the storage device, the cache memory, and the task belonging to the same module among the unused storage device, the cache memory, or the processor are preferentially assigned to the virtual device. The strike according to claim 2, which is assigned to a storage device. Over its own device. When allocating the unused storage device, the cache memory, and the task to the virtual storage device, the storage device or the cache memory or the task that is not reserved by an instruction from the computer is allocated. The storage apparatus according to claim 5. The storage apparatus according to claim 1, wherein whether to store the data in the external storage apparatus is switched according to an instruction from the computer. The processor reads the data and the control information stored in the external storage device, determines whether the license for the storage function used is valid from the control information, and if not, issues a warning message to the computer. The storage apparatus according to claim 4, wherein the storage apparatus is instructed to display. A storage device control method connected to at least one computer and an external storage device,
A plurality of storage devices for storing data; a plurality of cache memories; and a plurality of processors for processing input / output requests from the at least one computer by at least one of a plurality of tasks,
One of the plurality of processors allocates at least one of the plurality of storage devices, at least one of the plurality of cache memories, and at least one of the plurality of tasks to a virtual storage device,
The virtual storage device processes an input / output request from the at least one computer,
The processor receives a suspend instruction for the virtual storage device from a computer, and controls the storage device, the cache memory, the task, control information for managing the correspondence relationship of the virtual storage device, and the data. A storage control method comprising: storing in the external storage device; and releasing allocation of the storage device, the cache memory, and the task. One of the plurality of processors stores the data and the control information in the external storage device, and then powers off the external storage device,
After deallocating the storage device, the cache memory, and the task,
The storage device, the cache memory, and the processor that are assigned to the virtual storage device to be powered off are assigned to virtual storage devices other than the virtual storage device to be powered off. The storage control method according to claim 13, wherein when there is not, the storage device, the cache memory, and the processor are powered off. One of the plurality of processors receives a resume instruction for the virtual storage device from a computer, and when the external storage device is powered off, turns on the external storage device,
If the processor is powered off, turn on the processor, the processor reads the data and the control information stored in the external storage device,
If an unused storage device or cache memory is turned off, turn it on,
The storage control method according to claim 14, wherein the storage device, the cache memory, and the task are allocated to the virtual storage device. If the external storage device is powered off, turn on the external storage device,
If the processor is powered off, turn on the processor,
The processor reads the data and the control information stored in the external storage device, and allocates a storage device, a cache memory, and a task of a storage device different from the storage device before the allocation release to the virtual storage device. Item 15. The storage control method according to Item 14. The said processor has the identification information of the said computer, the change information of the said identification information of the said computer, and key information, and when it corresponds with the key information received from the said computer, the previous period change information is updated. Storage control method. When the processor allocates the storage device, the cache memory, and the task to the virtual storage device, the processor determines whether the identification information has been changed by the change information. The storage control method according to claim 17, wherein the storage control method is updated. In response to the performance request of the virtual storage device sent from the computer, the processor searches for an unused storage device, cache memory, and task that satisfies the request, and responds to the request. 14. The storage control method according to claim 13, wherein the parity group is changed. The package includes at least one of the plurality of storage devices, at least one of the plurality of cache memories, or at least one of the plurality of processors,
After the allocation of the storage device or the cache memory or the plurality of processors in the package to the plurality of virtual storage devices is released,
The power supply of the package is turned off when the package assigned to the virtual storage device to be turned off is not assigned to a virtual storage device other than the virtual storage device to be turned off. 13. The storage device according to 13. The storage device includes a plurality of modules, and the module includes a package including at least one of the plurality of storage devices, at least one of the plurality of cache memories, or at least one of the plurality of processors. If the external storage device is turned off, turn on the external storage device, and if the processor is turned off, turn on the processor, and the processor stores the data in the external storage device. Data and the control information are read, and the storage device, the cache memory, and the task belonging to the same module among the unused storage device, the cache memory, or the processor are preferentially assigned to the virtual device. 15. The storage device according to claim 14, which is assigned to a storage device. Storage control method. When allocating the unused storage device, the cache memory, and the task to the virtual storage device, the storage device or the cache memory or the task that is not reserved by an instruction from the computer is allocated. The storage control method according to claim 17. The storage control method according to claim 13, wherein whether to store the data in the external storage device is switched according to an instruction from the computer. The processor reads the data and the control information stored in the external storage device, determines whether the license for the storage function used is valid from the control information, and if not, issues a warning message to the computer. The storage control method according to claim 16, wherein an instruction is given to display. A storage device connected to at least one computer and an external storage device,
A plurality of storage devices for storing data; a plurality of cache memories; and a plurality of processors for processing input / output requests from the at least one computer by at least one of a plurality of tasks;
The processor allocates at least one of the storage device, the cache memory, and the plurality of tasks to a virtual storage device;
The virtual storage apparatus processes an input / output request from at least one of the computers,
The processor has a suspend processing means and a resume processing means,
When the suspend processing means is executed in accordance with an instruction from the computer, the processor does not accept an input / output request to the storage device from the computer, migrates the data on the cache memory to the storage device, and performs the control. Storing the information and the data in the external storage device, releasing the storage device, the cache memory, and the task, turning off the power of the storage device, the cache memory, and the processor;
When the resume processing means is executed according to an instruction from the computer,
The processor reads the control information from the external storage device, searches for the unused storage device or the cache memory or the processor required from the control information, and uses the unused storage device or the cache memory or the processor. When the power of the processor is turned off, the power is turned on, the unused storage device or the cache memory or the processor is assigned to the virtual storage device, and the data from the external storage device is assigned to the unused storage device A storage device to be migrated.

Images